extend

Are there any other steps required to extend a class in Laravel 3? I created application/libraries/response.php : class Response extends Laravel\Response { public static function json($data, $status = 200, $headers = array(), $json_options = 0) { $headers['Content-Type'] = 'application/json; charset=utf-8'; if(isset($data['error'])) { $status = 400; } dd($data); return new static(json_encode($data, $json_options), $status, $headers); } public static function my_test() { return var_dump('expression'); } } But for some reason, neither the my_test() function, or the modified json() function works

Is there a way to extend the val() function in jQuery. Basically, what I want to do is set a class variable if there is content being dynamically entered into an input. Whick normally would be something like var thisVal = 'Hello World'; $('#myInput').val(thisVal).addClass('dark'); It would just be nice to tell the val() function to always add the class 'dark' to an input if there is a value, and to remove it if it is empty. Possible? Try $.fn.xval = function () { return this.toggleClass(arguments.length).val.apply(this, arguments); }; Demo: http://jsfiddle.net/mattball/v9YFu/ You could do this

EDIT Answered: Although my original question didn't explain my needs in exactly the way the answer provided by Konrad Rudolph addressed them, He (by accident or design) essentially wrote for me what I was trying to write! The class itself does not get extended, but has it's functionality extended by making the class aware of new functions which allow it (the class) to handle a wider array of issues. My grateful thanks for an excellent answer which in turn is also a great tutorial, even if it does require some ahemm light? reading of books by me ;-). I am sure that this a very basic question,