note 79428 added to language.types.null

jaumesb aat consert doot net mentions that certain values such as empty strings or 0 convert to NULL if compared using ==. However, objects also evaluate to NULL if they have no variable members: <?php class js_incomplete_object { function js_incomplete_object() { } } $tmp=new js_incomplete_object(); if ($tmp==null) { echo "null\n"; } else { echo "not NULL\n"; } ?> The answer is NULL. However, if you add $this->a=1; to the constructor then the answer is not NULL. ---- Server IP: 69.147.83.197 Probable Submitter: 79.126.32.216 ---- Manual Page -- http://www.php.net/manual/en/language.types.null.php Edit -- https://master.php.net/note/edit/79428 Del: integrated -- https://master.php.net/note/delete/79428/integrated Del: useless -- https://master.php.net/note/delete/79428/useless Del: bad code -- https://master.php.net/note/delete/79428/bad+code Del: spam -- https://master.php.net/note/delete/79428/spam Del: non-english -- https://master.php.net/note/delete/79428/non-english Del: in docs -- https://master.php.net/note/delete/79428/in+docs Del: other reasons-- https://master.php.net/note/delete/79428 Reject -- https://master.php.net/note/reject/79428 Search -- https://master.php.net/manage/user-notes.php