note 100584 added to function.empty

Be careful, if "0" (zero as a string), 0 (zero as an integer) and -0 (minus zero as an integer) return true, "-0" (minus zero as a string (yes, I already had some customers that wrote -0 into a form field)) returns false. You need to cast your variable before testing it with the empty() function : <?php $var = "-0"; echo empty($var); // returns false $var = (int) $var; // casts $var as an integer echo empty($vat); // returns true ?> ---- Server IP: 195.221.21.36 Probable Submitter: 82.228.65.50 ---- Manual Page -- http://www.php.net/manual/en/function.empty.php Edit -- https://master.php.net/note/edit/100584 Del: integrated -- https://master.php.net/note/delete/100584/integrated Del: useless -- https://master.php.net/note/delete/100584/useless Del: bad code -- https://master.php.net/note/delete/100584/bad+code Del: spam -- https://master.php.net/note/delete/100584/spam Del: non-english -- https://master.php.net/note/delete/100584/non-english Del: in docs -- https://master.php.net/note/delete/100584/in+docs Del: other reasons-- https://master.php.net/note/delete/100584 Reject -- https://master.php.net/note/reject/100584 Search -- https://master.php.net/manage/user-notes.php