PMA\libraries\ErrorHandler::__construct PHP Метод

    public function __construct()
    {
        /**
         * Do not set ourselves as error handler in case of testsuite.
         *
         * This behavior is not tested there and breaks other tests as they
         * rely on PHPUnit doing it's own error handling which we break here.
         */
        if (!defined('TESTSUITE')) {
            set_error_handler(array($this, 'handleError'));
        }
    }