Can't use method return value in write context

Question

I would think the following piece of code should work, but it doesn\'t (Edited: Now works in PHP 5.5+):

if (!empty($r->getError()))
         


        

Answer 1

As pointed out by others, it's a (weird) limitation of empty().

For most purproses, doing this is equal as calling empty, but this works:

if ($r->getError() != '')