MySqlCheck.php

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<?php
 
namespace ‪TYPO3\CMS\Install\SystemEnvironment\DatabasePlatform;
 
/*
 * This file is part of the TYPO3 CMS project.
 *
 * It is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License, either version 2
 * of the License, or any later version.
 *
 * For the full copyright and license information, please read the
 * LICENSE.txt file that was distributed with this source code.
 *
 * The TYPO3 project - inspiring people to share!
 */
 
use ‪TYPO3\CMS\Core\Database\Connection;
use ‪TYPO3\CMS\Core\Database\ConnectionPool;
use ‪TYPO3\CMS\Core\Messaging\FlashMessage;
use ‪TYPO3\CMS\Core\Messaging\FlashMessageQueue;
use ‪TYPO3\CMS\Core\Utility\GeneralUtility;
use ‪TYPO3\CMS\Install\SystemEnvironment\CheckInterface;
 
class ‪MySqlCheck implements ‪CheckInterface
{
    protected ‪$messageQueue;
 
    protected ‪$minimumMySQLVersion = '5.5.0';
 
    protected ‪$incompatibleSqlModes = [
        'NO_BACKSLASH_ESCAPES'
    ];
 
    public function ‪getStatus(): ‪FlashMessageQueue
    {
        $this->messageQueue = new ‪FlashMessageQueue('install');
        $defaultConnection = GeneralUtility::makeInstance(ConnectionPool::class)
            ->getConnectionByName(‪ConnectionPool::DEFAULT_CONNECTION_NAME);
        if (strpos($defaultConnection->getServerVersion(), 'MySQL') !== 0) {
            return ‪$this->messageQueue;
        }
        $this->‪checkMysqlVersion($defaultConnection);
        $this->‪checkInvalidSqlModes($defaultConnection);
        $this->‪checkMysqlDatabaseUtf8Status($defaultConnection);
        return ‪$this->messageQueue;
    }
 
    protected function ‪checkInvalidSqlModes(‪Connection $connection)
    {
        $detectedIncompatibleSqlModes = $this->‪getIncompatibleSqlModes($connection);
        if (!empty($detectedIncompatibleSqlModes)) {
            $this->messageQueue->enqueue(new ‪FlashMessage(
                'Incompatible SQL modes have been detected:'
                    . ' ' . implode(', ', $detectedIncompatibleSqlModes) . '.'
                    . ' The listed modes are not compatible with TYPO3 CMS.'
                    . ' You have to change that setting in your MySQL environment'
                    . ' or in $GLOBALS[\'TYPO3_CONF_VARS\'][\'DB\'][\'Connections\'][\'Default\'][\'initCommands\']',
                'Incompatible SQL modes found!',
                ‪FlashMessage::ERROR
            ));
        } else {
            $this->messageQueue->enqueue(new ‪FlashMessage(
                '',
                'No incompatible SQL modes found.'
            ));
        }
    }
 
    protected function ‪checkMysqlVersion(‪Connection $connection)
    {
        preg_match('/MySQL ((\d+\.)*(\d+\.)*\d+)/', $connection->‪getServerVersion(), $match);
        $currentMysqlVersion = $match[1];
        if (version_compare($currentMysqlVersion, $this->minimumMySQLVersion, '<')) {
            $this->messageQueue->enqueue(new ‪FlashMessage(
                'Your MySQL version ' . $currentMysqlVersion . ' is too old. TYPO3 CMS does not run'
                    . ' with this version. Update to at least MySQL ' . $this->minimumMySQLVersion,
                'MySQL version too low',
                ‪FlashMessage::ERROR
            ));
        } else {
            $this->messageQueue->enqueue(new ‪FlashMessage(
                '',
                'MySQL version is fine'
            ));
        }
    }
 
    protected function ‪checkMysqlDatabaseUtf8Status(‪Connection $connection)
    {
        $queryBuilder = $connection->‪createQueryBuilder();
        $defaultDatabaseCharset = (string)$queryBuilder->‪select('DEFAULT_CHARACTER_SET_NAME')
            ->‪from('information_schema.SCHEMATA')
            ->‪where(
                $queryBuilder->expr()->eq(
                    'SCHEMA_NAME',
                    $queryBuilder->createNamedParameter($connection->getDatabase(), \PDO::PARAM_STR)
                )
            )
            ->setMaxResults(1)
            ->‪execute()
            ->fetchColumn();
        // also allow utf8mb4
        if (strpos($defaultDatabaseCharset, 'utf8') !== 0) {
            $this->messageQueue->enqueue(new ‪FlashMessage(
                'Checking database character set failed, got key "'
                    . $defaultDatabaseCharset . '" instead of "utf8" or "utf8mb4"',
                'MySQL database character set check failed',
                ‪FlashMessage::ERROR
            ));
        } else {
            $this->messageQueue->enqueue(new ‪FlashMessage(
                '',
                'Your database uses utf-8. All good.'
            ));
        }
    }
 
    protected function ‪getIncompatibleSqlModes(‪Connection $connection): array
    {
        $sqlModes = explode(',', $connection->executeQuery('SELECT @@SESSION.sql_mode;')
            ->fetch(0)['@@SESSION.sql_mode']);
        return array_intersect($this->incompatibleSqlModes, $sqlModes);
    }
}