Format PHP error on production server

Question

I have custom error handlers on my production computer:

register_shutdown_function( "check_for_fatal" );
set_error_handler('errHandle');
set_exception_handler( "log_exception" );

All errors are sent to mail. But format is horrible (straight line text).

Does anybody know any library, function, owns any code, that would format error in html with as many details as possible. (message, file, line, errorclass, complete callstack, perhaps global variables - $_GET, $_POST, ...) As much information as possible, so I will have easier job fixing issues.

Why html? That is a pretty unsafe markup/language for such debugging purpose. — arkascha, Mar 08 '15 at 16:03
You can probably use Sentry for PHP: https://www.getsentry.com/for/php/ — Parag Tyagi, Mar 08 '15 at 16:06
Awesome! Handling all issues outside of syntax. +1 for you sir! — Vladimir Ramik, Mar 08 '15 at 16:09
@Parag Tyagi Getsentry is interesting, but I don't need so many options. Thanks anyway. — Makla, Mar 08 '15 at 16:15

score 0 · Answer 1 · answered Mar 08 '15 at 16:36

<?php
    // Defining the handlers.
    register_shutdown_function( 'FatalErrorHandler' );
    set_error_handler(          'ErrorHandler'      );

    function ErrorHandler( $iNumber, $sMessage, $sFile, $sLine, array $aContext )
    {
        $aLastError = error_get_last();

        // If we have a fatal error let the fatal handler take care of it.
        // Required otherwise dual logs will occur as both handlers are called.
        if ( $aLastError === NULL )
        {

            $aError = array();
            $aError[ 'error' ][ 'code'    ] = $iNumber;
            $aError[ 'error' ][ 'msg'     ] = $sMessage;
            $aError[ 'error' ][ 'file'    ] = $sFile;
            $aError[ 'error' ][ 'line'    ] = $sLine;
            $aError[ 'error' ][ 'context' ] = $aContext;

            // Remove output.
            ob_clean();

            $sOutputMsg = 'Error \'' . $iNumber . '\' occurred in ' . $sFile .
                ' on line ' . $sLine . ' Message: ' . $sMessage;

            $sTrace = '';
            $aTrace = debug_backtrace();
            $iCountTraces = count( $aTrace );
            for( $i = 0; $i < $iCountTraces; ++$i )
            {

                $sTrace .= '<h3>Trace '
                    . $i
                    . '</h3><div><pre>'
                    . print_r( $aTrace[ $i ], true )
                    . '</pre></div>';
            }
            $sFullMessage = '<div id="top">'
                . $sOutputMsg
                . '<br />Error: '
                . $iNumber
                . '<br />File: '
                . $sFile
                . '<br />Line: '
                . $sLine
                . '<br />'
                . $sMessage
                . '<br/ ></div><div id="trace">Context: <pre>'
                . print_r( $aContext, true )
                . '</pre><br / >Stacktrace: '
                . '<br />'
                . $sTrace;
            var_dump( $sFullMessage );
            // Log( $sFullMessage );
        }
    }

    function FatalErrorHandler()
    {
        $aLastError = error_get_last();

        // Ensure this is a fatal error otherwise let errorhandler handle it.
        if ( ( $aLastError[ 'type' ] === E_ERROR ) || ( $aLastError[ 'type' ] === E_USER_ERROR ) )
        {
            // Remove output.
            ob_clean();

            // Ensure we had data inside error get last.
            $sType = empty( $aLastError[ 'type' ] ) ? '' : $aLastError[ 'type' ];
            $sFile = empty( $aLastError[ 'file' ] ) ? '' : $aLastError[ 'file' ];
            $sLine = empty( $aLastError[ 'line' ] ) ? '' : $aLastError[ 'line' ];
            $sMsg  = empty( $aLastError[ 'msg' ]  ) ? '' : $aLastError[ 'msg' ];

            $sFullMessage = 'Fatal Error \''
                . $sType
                . '\' occurred in '
                . $sFile
                . ' on line '
                . $sLine
                . '<br />Message: '
                . $sMsg;

            // Fatal errors don't have a stacktrace.
            var_dump( $sFullMessage );
            // Log( $sFullMessage );
        }
    }
    // Examples:

    // Fatal error throw
    $oTmp = NULL;
    $oTmp->hey();

    // Error throw
    // e
?>

score 0 · Accepted Answer · answered Mar 08 '15 at 18:08

I also make my own. Since I deal a lot with PDO, I also check if exception is PDO and add some details.

Output is not pretty, but it is meant for developer and nobody else.

static function FormatException($exception, $level = 0)
        {
            $result = "";
            $result = sprintf('<div style="padding-left:%dpx">', $level * 20);
            $result .= sprintf("<div><b>Message: </b> %s</div>", $exception->getMessage());
            $result .= sprintf("<div><b>Code: </b> %s</div>", $exception->getCode());
            $result .= sprintf("<div><b>File: </b> %s</div>", $exception->getFile());
            $result .= sprintf("<div><b>Line: </b> %s</div>", $exception->getLine());
            $result .= sprintf("<div><b>Trace: </b></div>");
            $result .= sprintf('<div style="padding-left: 20px;">');
            foreach ($exception->getTrace() as $trace)
            {
                $result .= sprintf('<div style="border: 1px solid #000;margin-top: 10px;">');
                $result .= sprintf("<div><b>File: </b> %s</div>", $trace['file']);
                $result .= sprintf("<div><b>Line: </b> %s</div>", $trace['line']);
                $result .= sprintf("<div><b>Function: </b> %s</div>", $trace['function']);
                $result .= sprintf("<div><b>Class: </b> %s</div>", $trace['class']);
                $result .= sprintf("<div><b>Type: </b> %s</div>", $trace['type']);
                $result .= sprintf("<div><b>Args: </b></div>");
                $result .= sprintf('<div style="padding-left: 20px;">');
                foreach ($trace['args'] as $arg)
                    $result .= sprintf("<div><b>Arg: </b>%s</div>", json_encode($arg));
                $result .= sprintf("</div>");
                $result .= sprintf("</div>");
            }
            $result .= sprintf("</div>");
            if (get_class($exception) === "PDOException")
            {
                $result .= sprintf("<br />");
                $result .= sprintf("<div><b>PDO: </b></div>");
                $result .= sprintf('<div style="padding-left: 20px;">');
                $result .= sprintf("<div><b>Code: </b> %s</div>", $exception->errorInfo[0]);
                $result .= sprintf("<div><b>Driver code: </b> %s</div>", $exception->errorInfo[1]);
                $result .= sprintf("<div><b>Message: </b> %s</div>", $exception->errorInfo[2]);
                $result .= sprintf("</div>");
            }

            $prev = $exception->getPrevious();
            if (isset($prev))
                $result .= self::FormatException($prev, $level++);
            $result .= sprintf("</div>");
            $result .= sprintf("<br />");

            return $result;
        }

Format PHP error on production server

2 Answers2

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