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<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */

/**
 * Holds the PMA\libraries\controllers\server\ServerVariablesController
 *
 * @package PMA\libraries\controllers\server
 */

namespace PMA\libraries\controllers\server;

use PMA\libraries\controllers\Controller;
use PMA\libraries\Message;
use PMA\libraries\Template;
use PMA\libraries\Util;

/**
 * Handles viewing and editing server variables
 *
 * @package PMA\libraries\controllers\server
 */
class ServerVariablesController extends Controller
{
    /**
     * @var array Documentation links for variables
     */
    protected $variable_doc_links;

    /**
     * Constructs ServerVariablesController
     */
    public function __construct()
    {
        parent::__construct();

        $this->variable_doc_links = $this->_getDocumentLinks();
    }

    /**
     * Index action
     *
     * @return void
     */
    public function indexAction()
    {
        if (! empty($_REQUEST['ajax_request'])
            && isset($_REQUEST['type'])
            && $_REQUEST['type'] === 'getval'
        ) {
            $this->getValueAction();
            return;
        }

        if (! empty($_REQUEST['ajax_request'])
            && isset($_REQUEST['type'])
            && $_REQUEST['type'] === 'setval'
        ) {
            $this->setValueAction();
            return;
        }

        include 'libraries/server_common.inc.php';

        $header   = $this->response->getHeader();
        $scripts  = $header->getScripts();
        $scripts->addFile('server_variables.js');

        /**
         * Displays the sub-page heading
         */
        $doc_link = Util::showMySQLDocu('server_system_variables');
        $this->response->addHtml(
            PMA_getHtmlForSubPageHeader('variables', $doc_link)
        );

        /**
         * Sends the queries and buffers the results
         */
        $serverVarsResult = $this->dbi->tryQuery('SHOW SESSION VARIABLES;');

        if ($serverVarsResult !== false) {

            $serverVarsSession = array();
            while ($arr = $this->dbi->fetchRow($serverVarsResult)) {
                $serverVarsSession[$arr[0]] = $arr[1];
            }
            $this->dbi->freeResult($serverVarsResult);

            $serverVars = $this->dbi->fetchResult('SHOW GLOBAL VARIABLES;', 0, 1);

            /**
             * Link templates
            */
            $this->response->addHtml($this->_getHtmlForLinkTemplates());

            /**
             * Displays the page
            */
            $this->response->addHtml(
                $this->_getHtmlForServerVariables($serverVars, $serverVarsSession)
            );
        } else {
            /**
             * Display the error message
             */
            $this->response->addHTML(
                Message::error(
                    sprintf(
                        __(
                            'Not enough privilege to view server variables and '
                            . 'settings. %s'
                        ),
                        Util::showMySQLDocu(
                            'server-system-variables',
                            false,
                            'sysvar_show_compatibility_56'
                        )
                    )
                )->getDisplay()
            );
        }
    }

    /**
     * Handle the AJAX request for a single variable value
     *
     * @return void
     */
    public function getValueAction()
    {
        // Send with correct charset
        header('Content-Type: text/html; charset=UTF-8');
        // Do not use double quotes inside the query to avoid a problem
        // when server is running in ANSI_QUOTES sql_mode
        $varValue = $this->dbi->fetchSingleRow(
            'SHOW GLOBAL VARIABLES WHERE Variable_name=\''
            . $GLOBALS['dbi']->escapeString($_REQUEST['varName']) . '\';',
            'NUM'
        );

        if (isset($this->variable_doc_links[$_REQUEST['varName']][3])
            && $this->variable_doc_links[$_REQUEST['varName']][3] == 'byte'
        ) {
            $this->response->addJSON(
                'message',
                implode(
                    ' ', Util::formatByteDown($varValue[1], 3, 3)
                )
            );
        } else {
            $this->response->addJSON(
                'message',
                $varValue[1]
            );
        }
    }

    /**
     * Handle the AJAX request for setting value for a single variable
     *
     * @return void
     */
    public function setValueAction()
    {
        $value = $_REQUEST['varValue'];
        $matches = array();

        if (isset($this->variable_doc_links[$_REQUEST['varName']][3])
            && $this->variable_doc_links[$_REQUEST['varName']][3] == 'byte'
            && preg_match(
                '/^\s*(\d+(\.\d+)?)\s*(mb|kb|mib|kib|gb|gib)\s*$/i',
                $value,
                $matches
            )
        ) {
            $exp = array(
                'kb' => 1,
                'kib' => 1,
                'mb' => 2,
                'mib' => 2,
                'gb' => 3,
                'gib' => 3
            );
            $value = floatval($matches[1]) * Util::pow(
                1024,
                $exp[mb_strtolower($matches[3])]
            );
        } else {
            $value = $GLOBALS['dbi']->escapeString($value);
        }

        if (! is_numeric($value)) {
            $value="'" . $value . "'";
        }

        if (! preg_match("/[^a-zA-Z0-9_]+/", $_REQUEST['varName'])
            && $this->dbi->query(
                'SET GLOBAL ' . $_REQUEST['varName'] . ' = ' . $value
            )
        ) {
            // Some values are rounded down etc.
            $varValue = $this->dbi->fetchSingleRow(
                'SHOW GLOBAL VARIABLES WHERE Variable_name="'
                . $GLOBALS['dbi']->escapeString($_REQUEST['varName'])
                . '";', 'NUM'
            );
            $this->response->addJSON(
                'variable',
                htmlspecialchars(
                    $this->_formatVariable(
                        $_REQUEST['varName'],
                        $varValue[1]
                    )
                )
            );
        } else {
            $this->response->setRequestStatus(false);
            $this->response->addJSON(
                'error',
                __('Setting variable failed')
            );
        }
    }

    /**
     * Format Variable
     *
     * @param string  $name  variable name
     * @param integer $value variable value
     *
     * @return string formatted string
     */
    private function _formatVariable($name, $value)
    {
        if (is_numeric($value)) {
            if (isset($this->variable_doc_links[$name][3])
                && $this->variable_doc_links[$name][3]=='byte'
            ) {
                return '<abbr title="'
                    . Util::formatNumber($value, 0) . '">'
                    . implode(' ', Util::formatByteDown($value, 3, 3))
                    . '</abbr>';
            } else {
                return Util::formatNumber($value, 0);
            }
        }
        return $value;
    }

    /**
     * Prints link templates
     *
     * @return string
     */
    private function _getHtmlForLinkTemplates()
    {
        $url = 'server_variables.php' . PMA_URL_getCommon();
        return Template::get('server/variables/link_template')
            ->render(array('url' => $url));
    }

    /**
     * Prints Html for Server Variables
     *
     * @param array $serverVars        global variables
     * @param array $serverVarsSession session variables
     *
     * @return string
     */
    private function _getHtmlForServerVariables($serverVars, $serverVarsSession)
    {
        // filter
        $filterValue = ! empty($_REQUEST['filter']) ? $_REQUEST['filter'] : '';
        $output = Template::get('server/variables/variable_filter')
            ->render(array('filterValue' => $filterValue));

        $output .= '<table id="serverVariables" class="data filteredData noclick">';
        $output .= Template::get('server/variables/variable_table_head')->render();
        $output .= '<tbody>';

        $output .= $this->_getHtmlForServerVariablesItems(
            $serverVars, $serverVarsSession
        );

        $output .= '</tbody>';
        $output .= '</table>';

        return $output;
    }


    /**
     * Prints Html for Server Variables Items
     *
     * @param array $serverVars        global variables
     * @param array $serverVarsSession session variables
     *
     * @return string
     */
    private function _getHtmlForServerVariablesItems(
        $serverVars, $serverVarsSession
    ) {
        // list of static system variables
        $static_variables = $this->_getStaticSystemVariables();

        $output = '';
        $odd_row = true;
        foreach ($serverVars as $name => $value) {
            $has_session_value = isset($serverVarsSession[$name])
                && $serverVarsSession[$name] != $value;
            $row_class = ($odd_row ? ' odd' : ' even')
                . ($has_session_value ? ' diffSession' : '');
            $docLink = isset($this->variable_doc_links[$name])
                ? $this->variable_doc_links[$name] : null;
            $formattedValue = $this->_formatVariable($name, $value);

            $output .= Template::get('server/variables/variable_row')
                ->render(
                    array(
                        'rowClass'    => $row_class,
                        'editable'    => !in_array(
                            strtolower($name),
                            $static_variables
                        ),
                        'docLink'     => $docLink,
                        'name'        => $name,
                        'value'       => $formattedValue,
                        'isSuperuser' => $this->dbi->isSuperuser(),
                    )
                );

            if ($has_session_value) {
                $formattedValue = $this->_formatVariable(
                    $name, $serverVarsSession[$name]
                );
                $output .= Template::get('server/variables/session_variable_row')
                    ->render(
                        array(
                            'rowClass' => $row_class,
                            'value'    => $formattedValue,
                        )
                    );
            }

            $odd_row = ! $odd_row;
        }

        return $output;
    }

    /**
     * Returns Array of documentation links
     *
     * $variable_doc_links[string $name] = array(
     *    string $name,
     *    string $anchor,
     *    string $chapter,
     *    string $type,
     *    string $format);
     * string $name: name of the system variable
     * string $anchor: anchor to the documentation page
     * string $chapter: chapter of "HTML, one page per chapter" documentation
     * string $type: type of system variable
     * string $format: if set to 'byte' it will format the variable
     * with Util::formatByteDown()
     *
     * @return array
     */
    private function _getDocumentLinks()
    {
        $variable_doc_links = array();
        $variable_doc_links['auto_increment_increment'] = array(
            'auto_increment_increment',
            'replication-options-master',
            'sysvar');
        $variable_doc_links['auto_increment_offset'] = array(
            'auto_increment_offset',
            'replication-options-master',
            'sysvar');
        $variable_doc_links['autocommit'] = array(
            'autocommit',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['automatic_sp_privileges'] = array(
            'automatic_sp_privileges',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['back_log'] = array(
            'back_log',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['basedir'] = array(
            'basedir',
            'server-options',
            'option_mysqld');
        $variable_doc_links['big_tables'] = array(
            'big-tables',
            'server-options',
            'option_mysqld');
        $variable_doc_links['bind_address'] = array(
            'bind-address',
            'server-options',
            'option_mysqld');
        $variable_doc_links['binlog_cache_size'] = array(
            'binlog_cache_size',
            'replication-options-binary-log',
            'sysvar',
            'byte');
        $variable_doc_links['binlog_checksum'] = array(
            'binlog_checksum',
            'replication-options-binary-log',
            'sysvar');
        $variable_doc_links['binlog_direct_non_transactional_updates'] = array(
            'binlog_direct_non_transactional_updates',
            'replication-options-binary-log',
            'sysvar');
        $variable_doc_links['binlog_format'] = array(
            'binlog-format',
            'server-options',
            'sysvar');
        $variable_doc_links['binlog_max_flush_queue_time'] = array(
            'binlog_max_flush_queue_time',
            'replication-options-binary-log',
            'sysvar');
        $variable_doc_links['binlog_order_commits'] = array(
            'binlog_order_commits',
            'replication-options-binary-log',
            'sysvar');
        $variable_doc_links['binlog_row_image'] = array(
            'binlog_row_image',
            'replication-options-binary-log',
            'sysvar');
        $variable_doc_links['binlog_rows_query_log_events'] = array(
            'binlog_rows_query_log_events',
            'replication-options-binary-log',
            'sysvar');
        $variable_doc_links['binlog_stmt_cache_size'] = array(
            'binlog_stmt_cache_size',
            'replication-options-binary-log',
            'sysvar',
            'byte');
        $variable_doc_links['block_encryption_mode'] = array(
            'block_encryption_mode',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['bulk_insert_buffer_size'] = array(
            'bulk_insert_buffer_size',
            'server-system-variables',
            'sysvar',
            'byte');
        $variable_doc_links['character_set_client'] = array(
            'character_set_client',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['character_set_connection'] = array(
            'character_set_connection',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['character_set_database'] = array(
            'character_set_database',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['character_set_filesystem'] = array(
            'character-set-filesystem',
            'server-options',
            'option_mysqld');
        $variable_doc_links['character_set_results'] = array(
            'character_set_results',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['character_set_server'] = array(
            'character-set-server',
            'server-options',
            'option_mysqld');
        $variable_doc_links['character_set_system'] = array(
            'character_set_system',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['character_sets_dir'] = array(
            'character-sets-dir',
            'server-options',
            'option_mysqld');
        $variable_doc_links['collation_connection'] = array(
            'collation_connection',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['collation_database'] = array(
            'collation_database',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['collation_server'] = array(
            'collation-server',
            'server-options',
            'option_mysqld');
        $variable_doc_links['completion_type'] = array(
            'completion_type',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['concurrent_insert'] = array(
            'concurrent_insert',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['connect_timeout'] = array(
            'connect_timeout',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['core_file'] = array(
            'core_file',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['datadir'] = array(
            'datadir',
            'server-options',
            'option_mysqld');
        $variable_doc_links['date_format'] = array(
            'date_format',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['datetime_format'] = array(
            'datetime_format',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['debug'] = array(
            'debug',
            'server-options',
            'option_mysqld');
        $variable_doc_links['debug_sync'] = array(
            'debug_sync',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['default_storage_engine'] = array(
            'default-storage-engine',
            'server-options',
            'option_mysqld');
        $variable_doc_links['default_tmp_storage_engine'] = array(
            'default_tmp_storage_engine',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['default_week_format'] = array(
            'default_week_format',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['delay_key_write'] = array(
            'delay-key-write',
            'server-options',
            'option_mysqld');
        $variable_doc_links['delayed_insert_limit'] = array(
            'delayed_insert_limit',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['delayed_insert_timeout'] = array(
            'delayed_insert_timeout',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['delayed_queue_size'] = array(
            'delayed_queue_size',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['disconnect_on_expired_password'] = array(
            'disconnect_on_expired_password',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['div_precision_increment'] = array(
            'div_precision_increment',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['end_markers_in_json'] = array(
            'end_markers_in_json',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['enforce_gtid_consistency'] = array(
            'enforce_gtid_consistency',
            'replication-options-gtids',
            'sysvar');
        $variable_doc_links['eq_range_index_dive_limit'] = array(
            'eq_range_index_dive_limit',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['engine_condition_pushdown'] = array(
            'engine-condition-pushdown',
            'server-options',
            'option_mysqld');
        $variable_doc_links['error_count'] = array(
            'error_count',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['event_scheduler'] = array(
            'event-scheduler',
            'server-options',
            'option_mysqld');
        $variable_doc_links['expire_logs_days'] = array(
            'expire_logs_days',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['explicit_defaults_for_timestamp'] = array(
            'explicit_defaults_for_timestamp',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['external_user'] = array(
            'external_user',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['flush'] = array(
            'flush',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['flush_time'] = array(
            'flush_time',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['foreign_key_checks'] = array(
            'foreign_key_checks',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['ft_boolean_syntax'] = array(
            'ft_boolean_syntax',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['ft_max_word_len'] = array(
            'ft_max_word_len',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['ft_min_word_len'] = array(
            'ft_min_word_len',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['ft_query_expansion_limit'] = array(
            'ft_query_expansion_limit',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['ft_stopword_file'] = array(
            'ft_stopword_file',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['general_log'] = array(
            'general-log',
            'server-options',
            'option_mysqld');
        $variable_doc_links['general_log_file'] = array(
            'general_log_file',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['group_concat_max_len'] = array(
            'group_concat_max_len',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['gtid_executed'] = array(
            'gtid_executed',
            'replication-options-gtids',
            'sysvar');
        $variable_doc_links['gtid_mode'] = array(
            'gtid_mode',
            'replication-options-gtids',
            'sysvar');
        $variable_doc_links['gtid_owned'] = array(
            'gtid_owned',
            'replication-options-gtids',
            'sysvar');
        $variable_doc_links['gtid_purged'] = array(
            'gtid_purged',
            'replication-options-gtids',
            'sysvar');
        $variable_doc_links['have_compress'] = array(
            'have_compress',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['have_crypt'] = array(
            'have_crypt',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['have_csv'] = array(
            'have_csv',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['have_dynamic_loading'] = array(
            'have_dynamic_loading',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['have_geometry'] = array(
            'have_geometry',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['have_innodb'] = array(
            'have_innodb',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['have_ndbcluster'] = array(
            'have_ndbcluster',
            'mysql-cluster-system-variables',
            'sysvar');
        $variable_doc_links['have_openssl'] = array(
            'have_openssl',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['have_partitioning'] = array(
            'have_partitioning',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['have_profiling'] = array(
            'have_profiling',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['have_query_cache'] = array(
            'have_query_cache',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['have_rtree_keys'] = array(
            'have_rtree_keys',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['have_ssl'] = array(
            'have_ssl',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['have_symlink'] = array(
            'have_symlink',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['host_cache_size'] = array(
            'host_cache_size',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['hostname'] = array(
            'hostname',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['identity'] = array(
            'identity',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['ignore_builtin_innodb'] = array(
            'ignore-builtin-innodb',
            'innodb-parameters',
            'option_mysqld');
        $variable_doc_links['ignore_db_dirs'] = array(
            'ignore_db_dirs',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['init_connect'] = array(
            'init_connect',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['init_file'] = array(
            'init-file',
            'server-options',
            'option_mysqld');
        $variable_doc_links['init_slave'] = array(
            'init_slave',
            'replication-options-slave',
            'sysvar');
        $variable_doc_links['innodb_adaptive_flushing'] = array(
            'innodb_adaptive_flushing',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_adaptive_flushing_lwm'] = array(
            'innodb_adaptive_flushing_lwm',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_adaptive_hash_index'] = array(
            'innodb_adaptive_hash_index',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_adaptive_max_sleep_delay'] = array(
            'innodb_adaptive_max_sleep_delay',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_additional_mem_pool_size'] = array(
            'innodb_additional_mem_pool_size',
            'innodb-parameters',
            'sysvar',
            'byte');
        $variable_doc_links['innodb_api_bk_commit_interval'] = array(
            'innodb_api_bk_commit_interval',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_api_disable_rowlock'] = array(
            'innodb_api_disable_rowlock',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_api_enable_binlog'] = array(
            'innodb_api_enable_binlog',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_api_enable_mdl'] = array(
            'innodb_api_enable_mdl',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_api_trx_level'] = array(
            'innodb_api_trx_level',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_autoextend_increment'] = array(
            'innodb_autoextend_increment',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_autoinc_lock_mode'] = array(
            'innodb_autoinc_lock_mode',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_buffer_pool_dump_at_shutdown'] = array(
            'innodb_buffer_pool_dump_at_shutdown',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_buffer_pool_dump_now'] = array(
            'innodb_buffer_pool_dump_now',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_buffer_pool_filename'] = array(
            'innodb_buffer_pool_filename',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_buffer_pool_instances'] = array(
            'innodb_buffer_pool_instances',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_buffer_pool_load_abort'] = array(
            'innodb_buffer_pool_load_abort',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_buffer_pool_load_at_startup'] = array(
            'innodb_buffer_pool_load_at_startup',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_buffer_pool_load_now'] = array(
            'innodb_buffer_pool_load_now',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_buffer_pool_size'] = array(
            'innodb_buffer_pool_size',
            'innodb-parameters',
            'sysvar',
            'byte');
        $variable_doc_links['innodb_change_buffer_max_size'] = array(
            'innodb_change_buffer_max_size',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_change_buffering'] = array(
            'innodb_change_buffering',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_checksum_algorithm'] = array(
            'innodb_checksum_algorithm',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_checksums'] = array(
            'innodb_checksums',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_cmp_per_index_enabled'] = array(
            'innodb_cmp_per_index_enabled',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_commit_concurrency'] = array(
            'innodb_commit_concurrency',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_compression_failure_threshold_pct'] = array(
            'innodb_compression_failure_threshold_pct',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_compression_level'] = array(
            'innodb_compression_level',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_compression_pad_pct_max'] = array(
            'innodb_compression_pad_pct_max',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_concurrency_tickets'] = array(
            'innodb_concurrency_tickets',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_data_file_path'] = array(
            'innodb_data_file_path',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_data_home_dir'] = array(
            'innodb_data_home_dir',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_disable_sort_file_cache'] = array(
            'innodb_disable_sort_file_cache',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_doublewrite'] = array(
            'innodb_doublewrite',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_fast_shutdown'] = array(
            'innodb_fast_shutdown',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_file_format'] = array(
            'innodb_file_format',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_file_format_check'] = array(
            'innodb_file_format_check',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_file_format_max'] = array(
            'innodb_file_format_max',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_file_per_table'] = array(
            'innodb_file_per_table',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_flush_log_at_timeout'] = array(
            'innodb_flush_log_at_timeout',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_flush_log_at_trx_commit'] = array(
            'innodb_flush_log_at_trx_commit',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_flush_method'] = array(
            'innodb_flush_method',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_flush_neighbors'] = array(
            'innodb_flush_neighbors',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_flushing_avg_loops'] = array(
            'innodb_flushing_avg_loops',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_force_load_corrupted'] = array(
            'innodb_force_load_corrupted',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_force_recovery'] = array(
            'innodb_force_recovery',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_ft_aux_table'] = array(
            'innodb_ft_aux_table',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_ft_cache_size'] = array(
            'innodb_ft_cache_size',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_ft_enable_diag_print'] = array(
            'innodb_ft_enable_diag_print',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_ft_enable_stopword'] = array(
            'innodb_ft_enable_stopword',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_ft_max_token_size'] = array(
            'innodb_ft_max_token_size',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_ft_min_token_size'] = array(
            'innodb_ft_min_token_size',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_ft_num_word_optimize'] = array(
            'innodb_ft_num_word_optimize',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_ft_result_cache_limit'] = array(
            'innodb_ft_result_cache_limit',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_ft_server_stopword_table'] = array(
            'innodb_ft_server_stopword_table',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_ft_sort_pll_degree'] = array(
            'innodb_ft_sort_pll_degree',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_ft_total_cache_size'] = array(
            'innodb_ft_total_cache_size',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_ft_user_stopword_table'] = array(
            'innodb_ft_user_stopword_table',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_io_capacity'] = array(
            'innodb_io_capacity',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_io_capacity_max'] = array(
            'innodb_io_capacity_max',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_large_prefix'] = array(
            'innodb_large_prefix',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_lock_wait_timeout'] = array(
            'innodb_lock_wait_timeout',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_locks_unsafe_for_binlog'] = array(
            'innodb_locks_unsafe_for_binlog',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_log_buffer_size'] = array(
            'innodb_log_buffer_size',
            'innodb-parameters',
            'sysvar',
            'byte');
        $variable_doc_links['innodb_log_compressed_pages'] = array(
            'innodb_log_compressed_pages',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_log_file_size'] = array(
            'innodb_log_file_size',
            'innodb-parameters',
            'sysvar',
            'byte');
        $variable_doc_links['innodb_log_files_in_group'] = array(
            'innodb_log_files_in_group',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_log_group_home_dir'] = array(
            'innodb_log_group_home_dir',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_lru_scan_depth'] = array(
            'innodb_lru_scan_depth',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_max_dirty_pages_pct'] = array(
            'innodb_max_dirty_pages_pct',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_max_dirty_pages_pct_lwm'] = array(
            'innodb_max_dirty_pages_pct_lwm',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_max_purge_lag'] = array(
            'innodb_max_purge_lag',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_max_purge_lag_delay'] = array(
            'innodb_max_purge_lag_delay',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_mirrored_log_groups'] = array(
            'innodb_mirrored_log_groups',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_monitor_disable'] = array(
            'innodb_monitor_disable',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_monitor_enable'] = array(
            'innodb_monitor_enable',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_monitor_reset'] = array(
            'innodb_monitor_reset',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_monitor_reset_all'] = array(
            'innodb_monitor_reset_all',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_old_blocks_pct'] = array(
            'innodb_old_blocks_pct',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_old_blocks_time'] = array(
            'innodb_old_blocks_time',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_online_alter_log_max_size'] = array(
            'innodb_online_alter_log_max_size',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_open_files'] = array(
            'innodb_open_files',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_optimize_fulltext_only'] = array(
            'innodb_optimize_fulltext_only',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_page_size'] = array(
            'innodb_page_size',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_print_all_deadlocks'] = array(
            'innodb_print_all_deadlocks',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_purge_batch_size'] = array(
            'innodb_purge_batch_size',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_purge_threads'] = array(
            'innodb_purge_threads',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_random_read_ahead'] = array(
            'innodb_random_read_ahead',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_read_ahead_threshold'] = array(
            'innodb_read_ahead_threshold',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_read_io_threads'] = array(
            'innodb_read_io_threads',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_read_only'] = array(
            'innodb_read_only',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_replication_delay'] = array(
            'innodb_replication_delay',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_rollback_on_timeout'] = array(
            'innodb_rollback_on_timeout',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_rollback_segments'] = array(
            'innodb_rollback_segments',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_sort_buffer_size'] = array(
            'innodb_sort_buffer_size',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_spin_wait_delay'] = array(
            'innodb_spin_wait_delay',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_stats_auto_recalc'] = array(
            'innodb_stats_auto_recalc',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_stats_method'] = array(
            'innodb_stats_method',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_stats_on_metadata'] = array(
            'innodb_stats_on_metadata',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_stats_persistent'] = array(
            'innodb_stats_persistent',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_stats_persistent_sample_pages'] = array(
            'innodb_stats_persistent_sample_pages',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_stats_sample_pages'] = array(
            'innodb_stats_sample_pages',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_stats_transient_sample_pages'] = array(
            'innodb_stats_transient_sample_pages',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_status_output'] = array(
            'innodb_status_output',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_status_output_locks'] = array(
            'innodb_status_output_locks',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_strict_mode'] = array(
            'innodb_strict_mode',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_support_xa'] = array(
            'innodb_support_xa',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_sync_array_size'] = array(
            'innodb_sync_array_size',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_sync_spin_loops'] = array(
            'innodb_sync_spin_loops',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_table_locks'] = array(
            'innodb_table_locks',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_thread_concurrency'] = array(
            'innodb_thread_concurrency',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_thread_sleep_delay'] = array(
            'innodb_thread_sleep_delay',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_undo_directory'] = array(
            'innodb_undo_directory',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_undo_logs'] = array(
            'innodb_undo_logs',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_undo_tablespaces'] = array(
            'innodb_undo_tablespaces',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_use_native_aio'] = array(
            'innodb_use_native_aio',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_use_sys_malloc'] = array(
            'innodb_use_sys_malloc',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_version'] = array(
            'innodb_version',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['innodb_write_io_threads'] = array(
            'innodb_write_io_threads',
            'innodb-parameters',
            'sysvar');
        $variable_doc_links['insert_id'] = array(
            'insert_id',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['interactive_timeout'] = array(
            'interactive_timeout',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['join_buffer_size'] = array(
            'join_buffer_size',
            'server-system-variables',
            'sysvar',
            'byte');
        $variable_doc_links['keep_files_on_create'] = array(
            'keep_files_on_create',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['key_buffer_size'] = array(
            'key_buffer_size',
            'server-system-variables',
            'sysvar',
            'byte');
        $variable_doc_links['key_cache_age_threshold'] = array(
            'key_cache_age_threshold',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['key_cache_block_size'] = array(
            'key_cache_block_size',
            'server-system-variables',
            'sysvar',
            'byte');
        $variable_doc_links['key_cache_division_limit'] = array(
            'key_cache_division_limit',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['language'] = array(
            'language',
            'server-options',
            'option_mysqld');
        $variable_doc_links['large_files_support'] = array(
            'large_files_support',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['large_page_size'] = array(
            'large_page_size',
            'server-system-variables',
            'sysvar',
            'byte');
        $variable_doc_links['large_pages'] = array(
            'large-pages',
            'server-options',
            'option_mysqld');
        $variable_doc_links['last_insert_id'] = array(
            'last_insert_id',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['lc_messages'] = array(
            'lc-messages',
            'server-options',
            'option_mysqld');
        $variable_doc_links['lc_messages_dir'] = array(
            'lc-messages-dir',
            'server-options',
            'option_mysqld');
        $variable_doc_links['lc_time_names'] = array(
            'lc_time_names',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['license'] = array(
            'license',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['local_infile'] = array(
            'local_infile',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['lock_wait_timeout'] = array(
            'lock_wait_timeout',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['locked_in_memory'] = array(
            'locked_in_memory',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['log'] = array(
            'log',
            'server-options',
            'option_mysqld');
        $variable_doc_links['log_bin'] = array(
            'log_bin',
            'replication-options-binary-log',
            'sysvar');
        $variable_doc_links['log-bin'] = array(
            'log-bin',
            'replication-options-binary-log',
            'option_mysqld');
        $variable_doc_links['log_bin_basename'] = array(
            'log_bin_basename',
            'replication-options-binary-log',
            'sysvar');
        $variable_doc_links['log_bin_index'] = array(
            'log_bin_index',
            'replication-options-binary-log',
            'sysvar');
        $variable_doc_links['log_bin_trust_function_creators'] = array(
            'log-bin-trust-function-creators',
            'replication-options-binary-log',
            'option_mysqld');
        $variable_doc_links['log_bin_use_v1_row_events'] = array(
            'log_bin_use_v1_row_events',
            'replication-options-binary-log',
            'sysvar');
        $variable_doc_links['log_error'] = array(
            'log-error',
            'server-options',
            'option_mysqld');
        $variable_doc_links['log_output'] = array(
            'log-output',
            'server-options',
            'option_mysqld');
        $variable_doc_links['log_queries_not_using_indexes'] = array(
            'log-queries-not-using-indexes',
            'server-options',
            'option_mysqld');
        $variable_doc_links['log_slave_updates'] = array(
            'log-slave-updates',
            'replication-options-slave',
            'option_mysqld');
        $variable_doc_links['log_slow_admin_statements'] = array(
            'log_slow_admin_statements',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['log_slow_slave_statements'] = array(
            'log_slow_slave_statements',
            'replication-options-slave',
            'sysvar');
        $variable_doc_links['log_throttle_queries_not_using_indexes'] = array(
            'log_throttle_queries_not_using_indexes',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['log_slow_queries'] = array(
            'log-slow-queries',
            'server-options',
            'option_mysqld');
        $variable_doc_links['log_warnings'] = array(
            'log-warnings',
            'server-options',
            'option_mysqld');
        $variable_doc_links['long_query_time'] = array(
            'long_query_time',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['low_priority_updates'] = array(
            'low-priority-updates',
            'server-options',
            'option_mysqld');
        $variable_doc_links['lower_case_file_system'] = array(
            'lower_case_file_system',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['lower_case_table_names'] = array(
            'lower_case_table_names',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['master_info_repository'] = array(
            'master_info_repository',
            'replication-options-slave',
            'sysvar');
        $variable_doc_links['master_verify_checksum'] = array(
            'master_verify_checksum',
            'replication-options-binary-log',
            'sysvar');
        $variable_doc_links['master-bind'] = array(
            '',
            'replication-options',
            0);
        $variable_doc_links['max_allowed_packet'] = array(
            'max_allowed_packet',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['max_binlog_cache_size'] = array(
            'max_binlog_cache_size',
            'replication-options-binary-log',
            'sysvar',
            'byte');
        $variable_doc_links['max_binlog_size'] = array(
            'max_binlog_size',
            'replication-options-binary-log',
            'sysvar',
            'byte');
        $variable_doc_links['max_binlog_stmt_cache_size'] = array(
            'max_binlog_stmt_cache_size',
            'replication-options-binary-log',
            'sysvar',
            'byte');
        $variable_doc_links['max_connect_errors'] = array(
            'max_connect_errors',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['max_connections'] = array(
            'max_connections',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['max_delayed_threads'] = array(
            'max_delayed_threads',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['max_error_count'] = array(
            'max_error_count',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['max_heap_table_size'] = array(
            'max_heap_table_size',
            'server-system-variables',
            'sysvar',
            'byte');
        $variable_doc_links['max_insert_delayed_threads'] = array(
            'max_insert_delayed_threads',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['max_join_size'] = array(
            'max_join_size',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['max_length_for_sort_data'] = array(
            'max_length_for_sort_data',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['max_long_data_size'] = array(
            'max_long_data_size',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['max_prepared_stmt_count'] = array(
            'max_prepared_stmt_count',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['max_relay_log_size'] = array(
            'max_relay_log_size',
            'server-system-variables',
            'sysvar',
            'byte');
        $variable_doc_links['max_seeks_for_key'] = array(
            'max_seeks_for_key',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['max_sort_length'] = array(
            'max_sort_length',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['max_sp_recursion_depth'] = array(
            'max_sp_recursion_depth',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['max_tmp_tables'] = array(
            'max_tmp_tables',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['max_user_connections'] = array(
            'max_user_connections',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['max_write_lock_count'] = array(
            'max_write_lock_count',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['metadata_locks_cache_size'] = array(
            'metadata_locks_cache_size',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['metadata_locks_hash_instances'] = array(
            'metadata_locks_hash_instances',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['memlock'] = array(
            'memlock',
            'server-options',
            'option_mysqld');
        $variable_doc_links['min_examined_row_limit'] = array(
            'min-examined-row-limit',
            'server-options',
            'option_mysqld');
        $variable_doc_links['multi_range_count'] = array(
            'multi_range_count',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['myisam_data_pointer_size'] = array(
            'myisam_data_pointer_size',
            'server-system-variables',
            'sysvar',
            'byte');
        $variable_doc_links['myisam_max_sort_file_size'] = array(
            'myisam_max_sort_file_size',
            'server-system-variables',
            'sysvar',
            'byte');
        $variable_doc_links['myisam_mmap_size'] = array(
            'myisam_mmap_size',
            'server-system-variables',
            'sysvar',
            'byte');
        $variable_doc_links['myisam_recover_options'] = array(
            'myisam_recover_options',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['myisam_repair_threads'] = array(
            'myisam_repair_threads',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['myisam_sort_buffer_size'] = array(
            'myisam_sort_buffer_size',
            'server-system-variables',
            'sysvar',
            'byte');
        $variable_doc_links['myisam_stats_method'] = array(
            'myisam_stats_method',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['myisam_use_mmap'] = array(
            'myisam_use_mmap',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['named_pipe'] = array(
            'named_pipe',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['net_buffer_length'] = array(
            'net_buffer_length',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['net_read_timeout'] = array(
            'net_read_timeout',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['net_retry_count'] = array(
            'net_retry_count',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['net_write_timeout'] = array(
            'net_write_timeout',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['new'] = array(
            'new',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['old'] = array(
            'old',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['old_alter_table'] = array(
            'old-alter-table',
            'server-options',
            'option_mysqld');
        $variable_doc_links['old_passwords'] = array(
            'old-passwords',
            'server-options',
            'option_mysqld');
        $variable_doc_links['open_files_limit'] = array(
            'open-files-limit',
            'server-options',
            'option_mysqld');
        $variable_doc_links['optimizer_prune_level'] = array(
            'optimizer_prune_level',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['optimizer_search_depth'] = array(
            'optimizer_search_depth',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['optimizer_switch'] = array(
            'optimizer_switch',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['optimizer_trace'] = array(
            'optimizer_trace',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['optimizer_trace_features'] = array(
            'optimizer_trace_features',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['optimizer_trace_limit'] = array(
            'optimizer_trace_limit',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['optimizer_trace_max_mem_size'] = array(
            'optimizer_trace_max_mem_size',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['optimizer_trace_offset'] = array(
            'optimizer_trace_offset',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['partition'] = array(
            'partition',
            'server-options',
            'option_mysqld');
        $variable_doc_links['performance_schema'] = array(
            'performance_schema',
            'performance-schema-system-variables',
            'sysvar');
        $variable_doc_links['performance_schema_accounts_size'] = array(
            'performance_schema_accounts_size',
            'performance-schema-system-variables',
            'sysvar');
        $variable_doc_links['performance_schema_digests_size'] = array(
            'performance_schema_digests_size',
            'performance-schema-system-variables',
            'sysvar');
        $variable_doc_links['performance_schema_events_stages_history_long_size']
            = array(
                'performance_schema_events_stages_history_long_size',
                'performance-schema-system-variables',
                'sysvar',
            );
        $variable_doc_links['performance_schema_events_stages_history_size'] = array(
            'performance_schema_events_stages_history_size',
            'performance-schema-system-variables',
            'sysvar');
        $variable_doc_links['performance_schema_events_statements_history_long_size']
            = array(
                'performance_schema_events_statements_history_long_size',
                'performance-schema-system-variables',
                'sysvar',
            );
        $variable_doc_links['performance_schema_events_statements_history_size']
            = array(
                'performance_schema_events_statements_history_size',
                'performance-schema-system-variables',
                'sysvar',
            );
        $variable_doc_links['performance_schema_events_waits_history_long_size']
            = array(
                'performance_schema_events_waits_history_long_size',
                'performance-schema-system-variables',
                'sysvar',
            );
        $variable_doc_links['performance_schema_events_waits_history_size'] = array(
            'performance_schema_events_waits_history_size',
            'performance-schema-system-variables',
            'sysvar');
        $variable_doc_links['performance_schema_hosts_size'] = array(
            'performance_schema_hosts_size',
            'performance-schema-system-variables',
            'sysvar');
        $variable_doc_links['performance_schema_max_cond_classes'] = array(
            'performance_schema_max_cond_classes',
            'performance-schema-system-variables',
            'sysvar');
        $variable_doc_links['performance_schema_max_cond_instances'] = array(
            'performance_schema_max_cond_instances',
            'performance-schema-system-variables',
            'sysvar');
        $variable_doc_links['performance_schema_max_file_classes'] = array(
            'performance_schema_max_file_classes',
            'performance-schema-system-variables',
            'sysvar');
        $variable_doc_links['performance_schema_max_file_handles'] = array(
            'performance_schema_max_file_handles',
            'performance-schema-system-variables',
            'sysvar');
        $variable_doc_links['performance_schema_max_file_instances'] = array(
            'performance_schema_max_file_instances',
            'performance-schema-system-variables',
            'sysvar');
        $variable_doc_links['performance_schema_max_mutex_classes'] = array(
            'performance_schema_max_mutex_classes',
            'performance-schema-system-variables',
            'sysvar');
        $variable_doc_links['performance_schema_max_mutex_instances'] = array(
            'performance_schema_max_mutex_instances',
            'performance-schema-system-variables',
            'sysvar');
        $variable_doc_links['performance_schema_max_rwlock_classes'] = array(
            'performance_schema_max_rwlock_classes',
            'performance-schema-system-variables',
            'sysvar');
        $variable_doc_links['performance_schema_max_rwlock_instances'] = array(
            'performance_schema_max_rwlock_instances',
            'performance-schema-system-variables',
            'sysvar');
        $variable_doc_links['performance_schema_max_socket_classes'] = array(
            'performance_schema_max_socket_classes',
            'performance-schema-system-variables',
            'sysvar');
        $variable_doc_links['performance_schema_max_socket_instances'] = array(
            'performance_schema_max_socket_instances',
            'performance-schema-system-variables',
            'sysvar');
        $variable_doc_links['performance_schema_max_stage_classes'] = array(
            'performance_schema_max_stage_classes',
            'performance-schema-system-variables',
            'sysvar');
        $variable_doc_links['performance_schema_max_statement_classes'] = array(
            'performance_schema_max_statement_classes',
            'performance-schema-system-variables',
            'sysvar');
        $variable_doc_links['performance_schema_max_table_handles'] = array(
            'performance_schema_max_table_handles',
            'performance-schema-system-variables',
            'sysvar');
        $variable_doc_links['performance_schema_max_table_instances'] = array(
            'performance_schema_max_table_instances',
            'performance-schema-system-variables',
            'sysvar');
        $variable_doc_links['performance_schema_max_thread_classes'] = array(
            'performance_schema_max_thread_classes',
            'performance-schema-system-variables',
            'sysvar');
        $variable_doc_links['performance_schema_max_thread_instances'] = array(
            'performance_schema_max_thread_instances',
            'performance-schema-system-variables',
            'sysvar');
        $variable_doc_links['performance_schema_session_connect_attrs_size'] = array(
            'performance_schema_session_connect_attrs_size',
            'performance-schema-system-variables',
            'sysvar');
        $variable_doc_links['performance_schema_setup_actors_size'] = array(
            'performance_schema_setup_actors_size',
            'performance-schema-system-variables',
            'sysvar');
        $variable_doc_links['performance_schema_setup_objects_size'] = array(
            'performance_schema_setup_objects_size',
            'performance-schema-system-variables',
            'sysvar');
        $variable_doc_links['performance_schema_users_size'] = array(
            'performance_schema_users_size',
            'performance-schema-system-variables',
            'sysvar');
        $variable_doc_links['pid_file'] = array(
            'pid-file',
            'server-options',
            'option_mysqld');
        $variable_doc_links['plugin_dir'] = array(
            'plugin_dir',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['port'] = array(
            'port',
            'server-options',
            'option_mysqld');
        $variable_doc_links['preload_buffer_size'] = array(
            'preload_buffer_size',
            'server-system-variables',
            'sysvar',
            'byte');
        $variable_doc_links['profiling'] = array(
            'profiling',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['profiling_history_size'] = array(
            'profiling_history_size',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['protocol_version'] = array(
            'protocol_version',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['proxy_user'] = array(
            'proxy_user',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['pseudo_thread_id'] = array(
            'pseudo_thread_id',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['query_alloc_block_size'] = array(
            'query_alloc_block_size',
            'server-system-variables',
            'sysvar',
            'byte');
        $variable_doc_links['query_cache_limit'] = array(
            'query_cache_limit',
            'server-system-variables',
            'sysvar',
            'byte');
        $variable_doc_links['query_cache_min_res_unit'] = array(
            'query_cache_min_res_unit',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['query_cache_size'] = array(
            'query_cache_size',
            'server-system-variables',
            'sysvar',
            'byte');
        $variable_doc_links['query_cache_type'] = array(
            'query_cache_type',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['query_cache_wlock_invalidate'] = array(
            'query_cache_wlock_invalidate',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['query_prealloc_size'] = array(
            'query_prealloc_size',
            'server-system-variables',
            'sysvar',
            'byte');
        $variable_doc_links['rand_seed1'] = array(
            'rand_seed1',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['rand_seed2'] = array(
            'rand_seed2',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['range_alloc_block_size'] = array(
            'range_alloc_block_size',
            'server-system-variables',
            'sysvar',
            'byte');
        $variable_doc_links['read_buffer_size'] = array(
            'read_buffer_size',
            'server-system-variables',
            'sysvar',
            'byte');
        $variable_doc_links['read_only'] = array(
            'read_only',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['read_rnd_buffer_size'] = array(
            'read_rnd_buffer_size',
            'server-system-variables',
            'sysvar',
            'byte');
        $variable_doc_links['relay_log'] = array(
            'relay_log',
            'replication-options-slave',
            'sysvar');
        $variable_doc_links['relay_log_basename'] = array(
            'relay_log_basename',
            'replication-options-slave',
            'sysvar');
        $variable_doc_links['relay-log-index'] = array(
            'relay-log-index',
            'replication-options-slave',
            'option_mysqld');
        $variable_doc_links['relay_log_index'] = array(
            'relay_log_index',
            'replication-options-slave',
            'sysvar');
        $variable_doc_links['relay_log_info_file'] = array(
            'relay_log_info_file',
            'replication-options-slave',
            'sysvar');
        $variable_doc_links['relay_log_info_repository'] = array(
            'relay_log_info_repository',
            'replication-options-slave',
            'sysvar');
        $variable_doc_links['relay_log_purge'] = array(
            'relay_log_purge',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['relay_log_recovery'] = array(
            'relay_log_recovery',
            'replication-options-slave',
            'sysvar');
        $variable_doc_links['relay_log_space_limit'] = array(
            'relay_log_space_limit',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['report_host'] = array(
            'report-host',
            'replication-options-slave',
            'option_mysqld');
        $variable_doc_links['report_password'] = array(
            'report-password',
            'replication-options-slave',
            'option_mysqld');
        $variable_doc_links['report_port'] = array(
            'report-port',
            'replication-options-slave',
            'option_mysqld');
        $variable_doc_links['report_user'] = array(
            'report-user',
            'replication-options-slave',
            'option_mysqld');
        $variable_doc_links['rpl_stop_slave_timeout'] = array(
            'rpl_stop_slave_timeout',
            'replication-options-slave',
            'sysvar');
        $variable_doc_links['rpl_recovery_rank'] = array(
            'rpl_recovery_rank',
            'replication-options-slave',
            'option_mysqld');
        $variable_doc_links['rpl_semi_sync_master_enabled'] = array(
            'rpl_semi_sync_master_enabled',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['rpl_semi_sync_master_timeout'] = array(
            'rpl_semi_sync_master_timeout',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['rpl_semi_sync_master_trace_level'] = array(
            'rpl_semi_sync_master_trace_level',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['rpl_semi_sync_master_wait_no_slave'] = array(
            'rpl_semi_sync_master_wait_no_slave',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['rpl_semi_sync_slave_enabled'] = array(
            'rpl_semi_sync_slave_enabled',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['rpl_semi_sync_slave_trace_level'] = array(
            'rpl_semi_sync_slave_trace_level',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['safe_show_database'] = array(
            'safe-show-database',
            'server-options',
            'option_mysqld');
        $variable_doc_links['secure_auth'] = array(
            'secure-auth',
            'server-options',
            'option_mysqld');
        $variable_doc_links['secure_file_priv'] = array(
            'secure-file-priv',
            'server-options',
            'option_mysqld');
        $variable_doc_links['server_id'] = array(
            'server-id',
            'replication-options',
            'option_mysqld');
        $variable_doc_links['server_id_bits'] = array(
            'server_id_bits',
            'mysql-cluster-system-variables',
            'sysvar');
        $variable_doc_links['server_uuid'] = array(
            'server_uuid',
            'replication-options',
            'sysvar');
        $variable_doc_links['shared_memory'] = array(
            'shared_memory',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['shared_memory_base_name'] = array(
            'shared_memory_base_name',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['skip_external_locking'] = array(
            'skip-external-locking',
            'server-options',
            'option_mysqld');
        $variable_doc_links['skip_name_resolve'] = array(
            'skip-name-resolve',
            'server-options',
            'option_mysqld');
        $variable_doc_links['skip_networking'] = array(
            'skip-networking',
            'server-options',
            'option_mysqld');
        $variable_doc_links['skip_show_database'] = array(
            'skip-show-database',
            'server-options',
            'option_mysqld');
        $variable_doc_links['slave_allow_batching'] = array(
            'slave_allow_batching',
            'mysql-cluster-system-variables',
            'sysvar');
        $variable_doc_links['slave_checkpoint_group'] = array(
            'slave_checkpoint_group',
            'replication-options-slave',
            'sysvar');
        $variable_doc_links['slave_checkpoint_period'] = array(
            'slave_checkpoint_period',
            'replication-options-slave',
            'sysvar');
        $variable_doc_links['slave_compressed_protocol'] = array(
            'slave_compressed_protocol',
            'replication-options-slave',
            'sysvar');
        $variable_doc_links['slave_exec_mode'] = array(
            'slave_exec_mode',
            'replication-options-slave',
            'sysvar');
        $variable_doc_links['slave_load_tmpdir'] = array(
            'slave-load-tmpdir',
            'replication-options-slave',
            'option_mysqld');
        $variable_doc_links['slave_max_allowed_packet'] = array(
            'slave_max_allowed_packet',
            'replication-options-slave',
            'sysvar');
        $variable_doc_links['slave_net_timeout'] = array(
            'slave-net-timeout',
            'replication-options-slave',
            'option_mysqld');
        $variable_doc_links['slave_parallel_workers'] = array(
            'slave_parallel_workers',
            'replication-options-slave',
            'sysvar');
        $variable_doc_links['slave_pending_jobs_size_max'] = array(
            'slave_pending_jobs_size_max',
            'replication-options-slave',
            'sysvar');
        $variable_doc_links['slave_rows_search_algorithms'] = array(
            'slave_rows_search_algorithms',
            'replication-options-slave',
            'sysvar');
        $variable_doc_links['slave_skip_errors'] = array(
            'slave-skip-errors',
            'replication-options-slave',
            'option_mysqld');
        $variable_doc_links['slave_sql_verify_checksum'] = array(
            'slave_sql_verify_checksum',
            'replication-options-slave',
            'sysvar');
        $variable_doc_links['slave_transaction_retries'] = array(
            'slave_transaction_retries',
            'replication-options-slave',
            'sysvar');
        $variable_doc_links['slave_type_conversions'] = array(
            'slave_type_conversions',
            'replication-options-slave',
            'sysvar');
        $variable_doc_links['slow_launch_time'] = array(
            'slow_launch_time',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['slow_query_log'] = array(
            'slow-query-log',
            'server-options',
            'server-system-variables');
        $variable_doc_links['slow_query_log_file'] = array(
            'slow_query_log_file',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['socket'] = array(
            'socket',
            'server-options',
            'option_mysqld');
        $variable_doc_links['sort_buffer_size'] = array(
            'sort_buffer_size',
            'server-system-variables',
            'sysvar',
            'byte');
        $variable_doc_links['sql_auto_is_null'] = array(
            'sql_auto_is_null',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['sql_big_selects'] = array(
            'sql_big_selects',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['sql_big_tables'] = array(
            'big-tables',
            'server-options',
            'server-system-variables');
        $variable_doc_links['sql_buffer_result'] = array(
            'sql_buffer_result',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['sql_log_bin'] = array(
            'sql_log_bin',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['sql_log_off'] = array(
            'sql_log_off',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['sql_log_update'] = array(
            'sql_log_update',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['sql_low_priority_updates'] = array(
            'sql_low_priority_updates',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['sql_max_join_size'] = array(
            'sql_max_join_size',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['sql_mode'] = array(
            'sql-mode',
            'server-options',
            'option_mysqld');
        $variable_doc_links['sql_notes'] = array(
            'sql_notes',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['sql_quote_show_create'] = array(
            'sql_quote_show_create',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['sql_safe_updates'] = array(
            'sql_safe_updates',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['sql_select_limit'] = array(
            'sql_select_limit',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['sql_slave_skip_counter'] = array(
            'sql_slave_skip_counter',
            'replication-options-slave',
            'sysvar');
        $variable_doc_links['sql_warnings'] = array(
            'sql_warnings',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['ssl_ca'] = array(
            'ssl-ca',
            'ssl-options',
            'option_general');
        $variable_doc_links['ssl_capath'] = array(
            'ssl-capath',
            'ssl-options',
            'option_general');
        $variable_doc_links['ssl_cert'] = array(
            'ssl-cert',
            'ssl-options',
            'option_general');
        $variable_doc_links['ssl_cipher'] = array(
            'ssl-cipher',
            'ssl-options',
            'option_general');
        $variable_doc_links['ssl_crl'] = array(
            'ssl_crl',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['ssl_crlpath'] = array(
            'ssl_crlpath',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['ssl_key'] = array(
            'ssl-key',
            'ssl-options',
            'option_general');
        $variable_doc_links['storage_engine'] = array(
            'storage_engine',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['stored_program_cache'] = array(
            'stored_program_cache',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['sync_binlog'] = array(
            'sync_binlog',
            'replication-options-binary-log',
            'sysvar');
        $variable_doc_links['sync_frm'] = array(
            'sync_frm',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['sync_master_info'] = array(
            'sync_master_info',
            'replication-options-slave',
            'sysvar');
        $variable_doc_links['sync_relay_log'] = array(
            'sync_relay_log',
            'replication-options-slave',
            'sysvar');
        $variable_doc_links['sync_relay_log_info'] = array(
            'sync_relay_log_info',
            'replication-options-slave',
            'sysvar');
        $variable_doc_links['system_time_zone'] = array(
            'system_time_zone',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['table_definition_cache'] = array(
            'table_definition_cache',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['table_lock_wait_timeout'] = array(
            'table_lock_wait_timeout',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['table_open_cache'] = array(
            'table_open_cache',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['table_open_cache_instances'] = array(
            'table_open_cache_instances',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['table_type'] = array(
            'table_type',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['thread_cache_size'] = array(
            'thread_cache_size',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['thread_concurrency'] = array(
            'thread_concurrency',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['thread_handling'] = array(
            'thread_handling',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['thread_stack'] = array(
            'thread_stack',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['time_format'] = array(
            'time_format',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['time_zone'] = array(
            'time_zone',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['timed_mutexes'] = array(
            'timed_mutexes',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['timestamp'] = array(
            'timestamp',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['tmp_table_size'] = array(
            'tmp_table_size',
            'server-system-variables',
            'sysvar',
            'byte');
        $variable_doc_links['tmpdir'] = array(
            'tmpdir',
            'server-options',
            'option_mysqld');
        $variable_doc_links['transaction_alloc_block_size'] = array(
            'transaction_alloc_block_size',
            'server-system-variables',
            'sysvar',
            'byte');
        $variable_doc_links['transaction_prealloc_size'] = array(
            'transaction_prealloc_size',
            'server-system-variables',
            'sysvar',
            'byte');
        $variable_doc_links['tx_isolation'] = array(
            'tx_isolation',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['tx_read_only'] = array(
            'tx_read_only',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['unique_checks'] = array(
            'unique_checks',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['updatable_views_with_limit'] = array(
            'updatable_views_with_limit',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['version'] = array(
            'version',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['version_comment'] = array(
            'version_comment',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['version_compile_machine'] = array(
            'version_compile_machine',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['version_compile_os'] = array(
            'version_compile_os',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['wait_timeout'] = array(
            'wait_timeout',
            'server-system-variables',
            'sysvar');
        $variable_doc_links['warning_count'] = array(
            'warning_count',
            'server-system-variables',
            'sysvar');
        return $variable_doc_links;
    }

    /**
     * Returns array of static system variables (i.e. read-only)
     *
     * @return array
     */
    private function _getStaticSystemVariables()
    {
        $static_variables = array(
            'back_log',
            'basedir',
            'bind_address',
            'binlog_row_image',
            'character_set_system',
            'character_sets_dir',
            'core_file',
            'datadir',
            'date_format',
            'datetime_format',
            'disconnect_on_expired_password',
            'engine_condition_pushdown',
            'error_count',
            'explicit_defaults_for_timestamp',
            'external_user',
            'ft_max_word_len',
            'ft_min_word_len',
            'ft_query_expansion_limit',
            'ft_stopword_file',
            'gtid_executed',
            'gtid_owned',
            'have_compress',
            'have_crypt',
            'have_csv',
            'have_dynamic_loading',
            'have_geometry',
            'have_innodb',
            'have_ndbcluster',
            'have_openssl',
            'have_partitioning',
            'have_profiling',
            'have_query_cache',
            'have_rtree_keys',
            'have_ssl',
            'have_symlink',
            'hostname',
            'ignore_builtin_innodb',
            'ignore_db_dirs',
            'init_file',
            'innodb_additional_mem_pool_size',
            'innodb_api_disable_rowlock',
            'innodb_api_enable_binlog',
            'innodb_api_enable_mdl',
            'innodb_autoinc_lock_mode',
            'innodb_buffer_pool_instances',
            'innodb_buffer_pool_load_at_startup',
            'innodb_checksums',
            'innodb_data_file_path',
            'innodb_data_home_dir',
            'innodb_doublewrite',
            'innodb_file_format_check',
            'innodb_flush_method',
            'innodb_force_load_corrupted',
            'innodb_force_recovery',
            'innodb_ft_cache_size',
            'innodb_ft_max_token_size',
            'innodb_ft_min_token_size',
            'innodb_ft_sort_pll_degree',
            'innodb_ft_total_cache_size',
            'innodb_locks_unsafe_for_binlog',
            'innodb_log_buffer_size',
            'innodb_log_file_size',
            'innodb_log_files_in_group',
            'innodb_log_group_home_dir',
            'innodb_mirrored_log_groups',
            'innodb_open_files',
            'innodb_page_size',
            'innodb_purge_threads',
            'innodb_read_io_threads',
            'innodb_read_only',
            'innodb_rollback_on_timeout',
            'innodb_sort_buffer_size',
            'innodb_sync_array_size',
            'innodb_undo_directory',
            'innodb_undo_tablespaces',
            'innodb_use_native_aio',
            'innodb_use_sys_malloc',
            'innodb_version',
            'innodb_write_io_threads',
            'language',
            'large_files_support',
            'large_page_size',
            'large_pages',
            'lc_messages_dir',
            'license',
            'locked_in_memory',
            'log',
            'log_bin',
            'log-bin',
            'log_bin_basename',
            'log_bin_index',
            'log_bin_use_v1_row_events',
            'log_error',
            'log_slave_updates',
            'log_slow_queries',
            'lower_case_file_system',
            'lower_case_table_names',
            'master-bind',
            'max_long_data_size',
            'max_tmp_tables',
            'metadata_locks_cache_size',
            'metadata_locks_hash_instances',
            'memlock',
            'multi_range_count',
            'myisam_mmap_size',
            'myisam_recover_options',
            'named_pipe',
            'old',
            'open_files_limit',
            'partition',
            'performance_schema',
            'performance_schema_accounts_size',
            'performance_schema_digests_size',
            'performance_schema_events_stages_history_long_size',
            'performance_schema_events_stages_history_size',
            'performance_schema_events_statements_history_long_size',
            'performance_schema_events_statements_history_size',
            'performance_schema_events_waits_history_long_size',
            'performance_schema_events_waits_history_size',
            'performance_schema_hosts_size',
            'performance_schema_max_cond_classes',
            'performance_schema_max_cond_instances',
            'performance_schema_max_file_classes',
            'performance_schema_max_file_handles',
            'performance_schema_max_file_instances',
            'performance_schema_max_mutex_classes',
            'performance_schema_max_mutex_instances',
            'performance_schema_max_rwlock_classes',
            'performance_schema_max_rwlock_instances',
            'performance_schema_max_socket_classes',
            'performance_schema_max_socket_instances',
            'performance_schema_max_stage_classes',
            'performance_schema_max_statement_classes',
            'performance_schema_max_table_handles',
            'performance_schema_max_table_instances',
            'performance_schema_max_thread_classes',
            'performance_schema_max_thread_instances',
            'performance_schema_session_connect_attrs_size',
            'performance_schema_setup_actors_size',
            'performance_schema_setup_objects_size',
            'performance_schema_users_size',
            'pid_file',
            'plugin_dir',
            'port',
            'protocol_version',
            'proxy_user',
            'relay_log',
            'relay_log_basename',
            'relay-log-index',
            'relay_log_index',
            'relay_log_info_file',
            'relay_log_recovery',
            'relay_log_space_limit',
            'report_host',
            'report_password',
            'report_port',
            'report_user',
            'rpl_recovery_rank',
            'safe_show_database',
            'secure_file_priv',
            'server_id_bits',
            'server_uuid',
            'shared_memory',
            'shared_memory_base_name',
            'skip_external_locking',
            'skip_name_resolve',
            'skip_networking',
            'skip_show_database',
            'slave_checkpoint_group',
            'slave_checkpoint_period',
            'slave_load_tmpdir',
            'slave_rows_search_algorithms',
            'slave_skip_errors',
            'slave_type_conversions',
            'socket',
            'sql_big_tables',
            'sql_log_update',
            'sql_low_priority_updates',
            'sql_max_join_size',
            'ssl_ca',
            'ssl_capath',
            'ssl_cert',
            'ssl_cipher',
            'ssl_crl',
            'ssl_crlpath',
            'ssl_key',
            'system_time_zone',
            'table_lock_wait_timeout',
            'table_open_cache_instances',
            'table_type',
            'thread_concurrency',
            'thread_handling',
            'thread_stack',
            'time_format',
            'tmpdir',
            'version',
            'version_comment',
            'version_compile_machine',
            'version_compile_os',
            'warning_count',
        );

        return $static_variables;
    }
}

Filemanager

Name Type Size Permission Actions
ServerBinlogController.php File 7.55 KB 0644
ServerCollationsController.php File 2.17 KB 0644
ServerDatabasesController.php File 18.05 KB 0644
ServerEnginesController.php File 2.47 KB 0644
ServerPluginsController.php File 2.67 KB 0644
ServerVariablesController.php File 92.35 KB 0644