note 111576 added to function.unset

You don't need to check that a variable is set before you unset it. <?php unset($a); ?> is harmless. <?php if(isset($a)) { unset($a); } ?> is pointless complication. This doesn't apply to properties of objects that have __isset() methods that visibly change object state or __unset() methods that don't properly check their arguments or have extra side effects. The latter case means that __unset shouldn't do more than what it says on the tin, and also has the responsibility for checking (possibly using __isset()) that what it's being asked to do makes sense. The former case is just plain bad design. ---- Server IP: 69.147.83.199 Probable Submitter: 202.175.135.150 ---- Manual Page -- http://php.net/manual/en/function.unset.php Edit -- https://master.php.net/note/edit/111576 Del: integrated -- https://master.php.net/note/delete/111576/integrated Del: useless -- https://master.php.net/note/delete/111576/useless Del: bad code -- https://master.php.net/note/delete/111576/bad+code Del: spam -- https://master.php.net/note/delete/111576/spam Del: non-english -- https://master.php.net/note/delete/111576/non-english Del: in docs -- https://master.php.net/note/delete/111576/in+docs Del: other reasons-- https://master.php.net/note/delete/111576 Reject -- https://master.php.net/note/reject/111576 Search -- https://master.php.net/manage/user-notes.php