note 71623 added to language.oop5.object-comparison

Note that when comparing object attributes, the comparison is recursive (at least, it is with PHP 5.2). That is, if $a->x contains an object then that will be compared with $b->x in the same manner. Be aware that this can lead to recursion errors: <?php class Foo { public $x; } $a = new Foo(); $b = new Foo(); $a->x = $b; $b->x = $a; print_r($a == $b); ?> Results in: PHP Fatal error: Nesting level too deep - recursive dependency? in test.php on line 11 ---- Server IP: 210.138.109.182 Probable Submitter: 61.213.152.134 (proxied: Version 1.1-Build_SOL_1126 $Date: 11/10/2005 17:46:0044$(IWSS)) ---- Manual Page -- http://www.php.net/manual/en/language.oop5.object-comparison.php Edit -- https://master.php.net/note/edit/71623 Del: integrated -- https://master.php.net/note/delete/71623/integrated Del: useless -- https://master.php.net/note/delete/71623/useless Del: bad code -- https://master.php.net/note/delete/71623/bad+code Del: spam -- https://master.php.net/note/delete/71623/spam Del: non-english -- https://master.php.net/note/delete/71623/non-english Del: in docs -- https://master.php.net/note/delete/71623/in+docs Del: other reasons-- https://master.php.net/note/delete/71623 Reject -- https://master.php.net/note/reject/71623 Search -- https://master.php.net/manage/user-notes.php