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Editorial Team
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Asked: 2026-06-06T13:46:29+00:00

How can I make a script that tells me what the error is when

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How can I make a script that tells me what the error is when there is one in PHP?

I would assume I’d make a 500.shtml document, but what would I put in it?

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1 Answer

  1. Editorial Team

    I created one recently. Maybe you can use it.

    <?php

Class ErrorHandler
{
    private function __construct() { }

    public static function SetHandler($errTypes = ERROR_TYPES)
    {
        return set_error_handler(array('ErrorHandler' , 'Handler'), $errTypes);
    }

    public static function Handler($errNo, $errStr, $errFile, $errLine)
    {
        $backtrace = ErrorHandler::GetBacktrace(2);
        //Creating error message.
        $error_message = "\nErrNo: $errNo\n TEXT: $errStr\n LOCATION: $errFile\n LINE: $errLine at" . date('F j, Y, g:i:a') . " Showing Backtrace: $backtrace". "\n";

        if(LOG_ERRORS)
            error_log($error_message, 3 , LOG_ERROR_FILE);

        if(SEND_ERROR_MAIL == true)
            error_log($error_message, 1, ADMIN_ERROR_MAIL, "From: ". SENDMAIL_FROM . "\r\nTo: " . ADMIN_ERROR_MAIL);

        if( ($errNo == E_WARNING && IS_WARNING_FATAL ==false) || ($errNo == E_NOTICE || $errNo == E_USER_NOTICE) )
        {
            if(DEBUGGING)
                echo '<div class="error_box"> <b> <pre>' . $error_message. '</pre> </b> </div>';
        } else {
            if(DEBUGGING)
                echo '<div class="error_box"> <b> <pre>' . $error_message. '</pre> </b> </div>';
            else
            {
                echo SITE_GENERIC_FORM_MESSAGE;
                /*ob_clean();
                include '500.php';
                flush();
                ob_flush();
                ob_end_clean();
                exit();*/
            }
            exit();
        }
    }

    public static function GetBacktrace($irrelevantFirstEntries)
    {
        $s = '';
        $MAXSTRLEN = 64;
        $trace_array = debug_backtrace();

        for ($i = 0; $i < $irrelevantFirstEntries; $i++)
            array_shift($trace_array);

        $tabs = sizeof($trace_array) - 1;

        foreach($trace_array as $arr)
        {
            $tabs = $tabs - 1;
            if(isset($arr['class']))
                $s = $s . $arr['class'] . '.';
            $args = array();

            if(!empty($arr['agrs']))

                foreach($arr['args'] as $v)
                {
                    if(is_null($v))
                    $args[] = 'null';
                    elseif (is_array($v))
                        $args[] = 'Array[' . sizeof($v) . ']';
                    elseif (is_object($v))
                        $args[] = 'Object: ' . get_class($v);
                    elseif (is_bool($v))
                        $args[] = $v?'true':'false';
                    else
                    {
                        $v = (string)@$v;
                        $str = htmlspecialchars(substr($v, 0, $MAX STRLEN));
                        if (strlen($v) > $MAXSTRLEN)
                            $str = $str . "...";
                        $args[] = '"'.$str.'"';
                    }
                }

                $s = $s . $arr['function'] . '(' . implode(', ', $args). ')';
                $line = (isset ($arr['line']) ? $arr['line'] : "unknown");
                $file = (isset ($arr['file']) ? $arr['file'] : "unknown");
                $s = $s . sprintf(' # line %4d, file: $s', $line, $file);
                $s = $s . '\n';
        }
        return $s;

    }
}

?>

    Some changes required, obviously. Just include this file in your index.php.

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