php-blog/app/bootstrap.php

<?php

namespace App;

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

$environment = 'development';

/**
* Register the error handler
*/
$whoops = new \Whoops\Run;
if ($environment !== 'production') {
    $whoops->pushHandler(new \Whoops\Handler\PrettyPageHandler);
} else {
    $whoops->pushHandler(function($e){
        echo 'Hey, don\'t worry, just send an email to the developer';
    });
}
$whoops->register();

throw new \Exception;