indirect references to static function variables

Hi again, the ZEND_CHANGES file states: [...] * Static function variables. Statics are now treated at compile-time which allows developers to assign variables to statics by reference. This change also greatly improves their performance but means that indirect references to statics will not work anymore. [..] The only thing close to "indirect references" I could come up with, was this: <?php function foo() { static $a = 0; $a_name = "a"; echo $$a_name; echo $a; $a++; } foo(); foo(); ?> Which works as expected in both PHP 4 and 5. So what exactly doesn't work anymore? Or what is meant by "indirect references"? Best regards, Jan --