Laravel 4 Helper Class Function

helper

//Create New Folder Call MyClass on `app/` directory

Add new line on `/app/start/global.php`

    ClassLoader::addDirectories(array(
      app_path().'/commands',
      app_path().'/controllers',
      app_path().'/models',
      app_path().'/database/seeds',
      app_path().'/MyClass', // This line is the one we need to add
    ));

Create a file in `app/MyClass/Helper.php` and add such as like

    <?php namespace Helpers;
    
    class Helper {
    
        public static function helloWorld()
        {
            return 'Hello World';
        }
    }
    
All you would need to do is call `Helpers\Helper::helloWorld();`

You could also **alias** this helper class in your `/app/config/app.php` file. Just add something like this to the end of the aliases array:

    'Helper'          => 'Helpers\Helper'

See more on SO