Symfony delete all tables

/**
     * Clean database. Truncates all tables except from everything that loads with fixtures.
     * Used as a fast clean.
     */
    public function cleanDB()
    {

$excludeTables = array();
        $em = $this->em;
        $connection = $em->getConnection();

        //exclude tables
        $excludeTables = array(
        'ignoreTable1',
        'ignoreTable2',
        
              );

        //get all tables
        $query = $connection->prepare('show tables');
        $query->execute();
        $tables = $query->fetchAll();

        //clean data if not match with the $excludedTables array
        foreach ($tables as $table) {
            foreach ($table as $tableName) {
                if (in_array($tableName, $excludeTables) !== true) {
                    $connection->query('
                    START TRANSACTION;
                    SET FOREIGN_KEY_CHECKS=0;
                    TRUNCATE TABLE ' . $tableName . ';
                    SET FOREIGN_KEY_CHECKS=1;
                    COMMIT;
                ');
                }
            }

        }
}