CI_DB_driver::trans_begin PHP Méthode

    public function trans_begin($test_mode = FALSE)
    {
        if (!$this->trans_enabled) {
            return FALSE;
        } elseif ($this->_trans_depth > 0) {
            $this->_trans_depth++;
            return TRUE;
        }
        // Reset the transaction failure flag.
        // If the $test_mode flag is set to TRUE transactions will be rolled back
        // even if the queries produce a successful result.
        $this->_trans_failure = $test_mode === TRUE;
        if ($this->_trans_begin()) {
            $this->_trans_depth++;
            return TRUE;
        }
        return FALSE;
    }