dumbo/vendor/filp/whoops/examples/example.php

<?php
/**
 * Whoops - php errors for cool kids
 * @author Filipe Dobreira <http://github.com/filp>
 *
 * Run this example file with the PHP 5.4 web server with:
 *
 * $ cd project_dir
 * $ php -S localhost:8080
 *
 * and access localhost:8080/example/example.php through your browser
 *
 * Or just run it through apache/nginx/what-have-yous as usual.
 */

namespace Whoops\Example;
use Whoops\Run;
use Whoops\Handler\PrettyPageHandler;
use Exception as BaseException;

require __DIR__ . '/../vendor/autoload.php';

class Exception extends BaseException {}

$run     = new Run;
$handler = new PrettyPageHandler;

// Add a custom table to the layout:
$handler->addDataTable('Ice-cream I like', array(
    'Chocolate' => 'yes',
    'Coffee & chocolate' => 'a lot',
    'Strawberry & chocolate' => 'it\'s alright',
    'Vanilla' => 'ew'
));

$run->pushHandler($handler);

// Example: tag all frames inside a function with their function name
$run->pushHandler(function($exception, $inspector, $run) {

    $inspector->getFrames()->map(function($frame) {

        if($function = $frame->getFunction()) {
            $frame->addComment("This frame is within function '$function'", 'cpt-obvious');
        }

        return $frame;
    });

});

$run->register();

function fooBar() {
    throw new Exception("Something broke!");
}

function bar()
{
    fooBar();
}

bar();