PHP - Add a method to a class

Question

I'm looking for a way to extend a PHP class to add a custom method. In particular I want to add a date-format method to MongoDate (from the PHP MongoDB driver).

I just thought it would be much cleaner, if the MongoDate object received from a Mongo collectio, provides a method to make it readable, and not having the need to call a function or class to do that.

$d = new MongoDate();

some_date_format($d); // the way it works now

$d->format(); // the way it would be cleaner

Is there any solution?

Answer 1

Inherit from it!

class myClass extends MongoDate{
    public function format(){
    }
}

Then just implement it:

$d = new myClass ();

some_date_format($d); // the way it works now

$d->format(); // the way it would be cleaner