1--TEST-- 2GC 029: GC and destructors 3--SKIPIF-- 4<?php if (!PHP_ZTS) { print "skip only for zts build"; } 5--INI-- 6zend.enable_gc=1 7--FILE-- 8<?php 9class Foo { 10 public $bar; 11 public $x = array(1,2,3); 12 function __destruct() { 13 if ($this->bar !== null) { 14 $this->x = null; 15 unset($this->bar); 16 } 17 } 18} 19class Bar { 20 public $foo; 21 function __destruct() { 22 if ($this->foo !== null) { 23 unset($this->foo); 24 } 25 } 26 27} 28$foo = new Foo(); 29$bar = new Bar(); 30$foo->bar = $bar; 31$bar->foo = $foo; 32unset($foo); 33unset($bar); 34var_dump(gc_collect_cycles()); 35?> 36--EXPECT-- 37int(3) 38