Error reporting: Optionally, when using Apache, you can use the APPLICATION_ENV setting in your VirtualHost to let PHP output all its errors to the browser. This can be useful during the development of your application. Edit index.php from the zf2-tutorial/public/ directory and change it to the following:

index.php

<?php
 /**
  * Display all errors when APPLICATION_ENV is development.
  */
if ($_SERVER['APPLICATION_ENV'] == 'development') { error_reporting(E_ALL); ini_set("display_errors", 1);
    /**
     * This makes our life easier when dealing with paths. Everything is relative
     * to the application root now.
     */
    chdir(dirname(__DIR__));
    // Decline static file requests back to the PHP built-in webserver
    if (php_sapi_name() === 'cli-server' && is_file(__DIR__ . parse_url($_SERVER['REQUEST_URI'], PHP_URL))) return false;
}
 // Setup autoloading
require 'init_autoloader.php'; // Run the application!
Zend\Mvc\Application::init(require 'config/application.config.php')->run();