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Informations about the package error

Error handler

Makes handling and debugging PHP errors suck less.

Table of Contents

Features

Requirements

Usage example

use Vinala\Error\ErrorHandler;

$debug = true; // true during development, false in production
error_reporting(E_ALL | E_STRICT); // configure the error reporting

$errorHandler = new ErrorHandler($debug);
$errorHandler->register();

// trigger an error to see the error handler in action
echo $invalidVariable;

Event system

Error handler events

Possible events emitted by the ErrorHandler class:

error

fatal

emerg

Web error screen events

Possible events emitted by the WebErrorScreen class:

render

render.debug

layout.css

layout.js

CLI error screen events

Possible events emitted by the CliErrorScreen class:

render

render.debug

Event listener examples

Notes

Logging

Logging unhandled errors into a file.

use Vinala\Error\Util\Debug;

$errorHandler->on('fatal', function ($exception, $debug) {
    $logFilePath = sprintf('./errors_%s.log', $debug ? 'debug' : 'prod');

    $entry = sprintf(
        "[%s] %s - %s in file %s on line %d\n",
        date('Y-m-d H:i:s'),
        Debug::getExceptionName($exception),
        $exception->getMessage(),
        $exception->getFile(),
        $exception->getLine()
    );

    file_put_contents($logFilePath, $entry, FILE_APPEND | LOCK_EX);
});

Disabling the "@" operator

This listener causes statements like echo @$invalidVariable; to throw an exception regardless of the "shut-up" operator.

$errorHandler->on('error', function ($exception, $debug, &$suppressed) {
    $suppressed = false;
});

Altering the error screens

Examples for the web error screen.

Changing default labels of the non-debug error screen:

use Vinala\Error\Screen\WebErrorScreen;

$errorHandler->on('fatal', function ($exception, $debug, $screen) {
   if (!$debug && $screen instanceof WebErrorScreen) {
        $screen->on('render', function ($event) {
            $event['heading'] = 'It is all your fault!';
            $event['text'] = 'You have broken everything and now I hate you.';
        });
    }
});

Adding customized section to the debug screen:

use Vinala\Error\Screen\WebErrorScreen;

$errorHandler->on('fatal', function ($exception, $debug, $screen) {
   if ($debug && $screen instanceof WebErrorScreen) {
        $screen
            ->on('layout.css', function ($event) {
                $event['css'] .= '#custom-group {color: #f60000;}';
            })
            ->on('render.debug', function ($event) {
                $event['extras'] .= <<<HTML
<div id="custom-group" class="group">
    <div class="section">
        Example of a custom section
    </div>
</div>
HTML;
            })
        ;
    }
});

All versions of error with dependencies

PHP Build Version
Package Version
Requires php Version >=5.3.0
kuria/event Version ~1.0.0
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