2
Reference:
http://zend.com/manual/migration5.incompatible.phpHTTP_XXX_VARS are not by default enabled in PHP 5 and are about to be removed totally (if my memory serves me right), so one should use the short version from now on to ensure compatibility.
strpos(), array_merge() are changed a bit, but should not break too much
of the more severe ones are:
- No classes may have a method called clone()
- get_class($object_reference) and more now returns a string with upper and lower case letters as in the class name, whereas it used to be all lower-case
- You cannot reassign $this inside a class' methods
- an object with no properties is no longer considered 'empty'
