Description:
------------
Hello,

I'm creating an extended DateTime for my framework. The test script below gives "E_STRICT: Declaration of melt\core\DateTime::createFromFormat() should be compatible with that of DateTime::createFromFormat()" even though it's declared exactly as documented.

Also removing all the arguments what so ever doesn't make this problem go away so it's impossible to prototype DateTime::createFromFormat without getting this error.


Test script:
---------------
<?php namespace melt\core;

class DateTime extends \DateTime {
    public static function createFromFormat($format, $time, DateTimeZone $timezone = null) {
        return new DateTime(parent::createFromFormat($format, $time, $timezone));
    }
}


Expected result:
----------------
The class being declared as it should.

Actual result:
--------------
E_STRICT: Declaration of melt\core\DateTime::createFromFormat() should be compatible with that of DateTime::createFromFormat()