Auto-Config function for laravel's index.php, sets 'LARAVEL_ENV' based on the active page URL

laravel-autoconfig.php

<?php

/*
 | Set a 'urls' (note the plural) in your application.php config files.
 | Example application/config/application.php for PRODUCTION:
 |
 | return array(
 |    'urls' => array(
 |      'http://productionsite.com',
 |      'http://www.productionsite.com',
 |      'http://anothermirrordomain.com',
 |      'http://www.anothermirrordomain.com',
 |    ),
 | );
 |
 | Example application/config/DEVELOPMENT/application.php for DEVELOPMENT:
 |
 | return array(
 |    'urls' => array(
 |       'http://localhost/site1/public',
 |       'http://localhost:81/site1/public',
 |       'http://localhost:8080/site1/public',
 |    ),
 | );
 | 
 | Then you can use the function below to auto-detect the config that should be loaded
 | based on the current URL.
 |
 | Goes into your index.php right after you've required paths.php.
 |
 */

// ... (SNIPPED CONTENTS OF INDEX.PHP) ...

// --------------------------------------------------------------
// Set the core Laravel path constants.
// --------------------------------------------------------------
require '../paths.php';

// PASTE FUNCTION BELOW AFTER PATHS HAVE BEEN LOADED

array_map(function($path)
{

   // Only treat paths that have an application.php
   if(strpos($path, 'application.php') !== false)
   {

      // Every URL starts with http
      $pageurl = 'http';
      // If it's a secure connection add 's'
      if (isset($_SERVER['HTTPS'])) {
          $pageurl .= ( $_SERVER['HTTPS'] !== 'off' || !empty($_SERVER['HTTPS']) ) ? 's' : '';
      }
      // ... next comes the colon whack whack
      $pageurl .= '://' . $_SERVER['SERVER_NAME'];
      // ... and if it ain't port 80 add a :# (port)
      if (isset($_SERVER['SERVER_PORT'])) {
         $pageurl .= ( $_SERVER['SERVER_PORT'] != 80 ) ? ':' . $_SERVER['SERVER_PORT'] : '';
      }

      // Set the base directory name of the config
      $configdir = basename(dirname($path));

      // Load the array from the config file into $dirconfig
      $dirconfig = array_merge(require $path);

      // If URL is empty don't do anything, no need to change the LARAVEL_ENV var
      if (!empty($dirconfig['urls'])) {

         // If 'urls' in the config is just a key => value then make it an array.
         $urls = (!is_array($dirconfig['urls'])) ? (array)($dirconfig['urls']) : $dirconfig['urls'] ;

         foreach($urls as $url) {
            if (strpos($pageurl,$url)===0) {
              // We gots a match so change the LARAVEL_ENV to the name of the directory
              // we are currently investigating.
              $_SERVER['LARAVEL_ENV'] = $configdir;
            }
         }
      }
   }
}, iterator_to_array(new RecursiveIteratorIterator(new RecursiveDirectoryIterator(path('app')."config"))));