PHP memory and Zend Memory Manager

Хорошая статья про работу с памятью в среде разработки «для инвалидов», в PHP.

Zend Memory Manager has nothing to share with ZendGC. ZendGC, appeared in PHP 5.3, is about clearing circular references in PHP variables and that’s absolutely all it does. It then acts on top of ZendMM, for PHP variables containing themselves (circular references).