note 72162 added to language.references.unset

note that in the previous example all variables (or the one data item all variables point to) is set to NULL, what is interpreted as !isset(), but the linkage between the variables still exists, so <?php echo (isset($a)?"set":"unset")."\n"; $a=1; $b =& $a; echo (isset($b)?"set":"unset")."\n"; $a=null; echo (isset($b)?"set":"unset")."\n"; $a=1; echo (isset($b)?"set":"unset")."\n"; ?> shows: unset set unset set note that $b ist set again. So if you want to brake the linkage, you have to use unset() ---- Server IP: 217.160.72.57 Probable Submitter: 212.114.70.5 ---- Manual Page -- http://www.php.net/manual/en/language.references.unset.php Edit -- https://master.php.net/note/edit/72162 Del: integrated -- https://master.php.net/note/delete/72162/integrated Del: useless -- https://master.php.net/note/delete/72162/useless Del: bad code -- https://master.php.net/note/delete/72162/bad+code Del: spam -- https://master.php.net/note/delete/72162/spam Del: non-english -- https://master.php.net/note/delete/72162/non-english Del: in docs -- https://master.php.net/note/delete/72162/in+docs Del: other reasons-- https://master.php.net/note/delete/72162 Reject -- https://master.php.net/note/reject/72162 Search -- https://master.php.net/manage/user-notes.php