note 78524 added to function.in-array

In case you have to check for unknown or dynamic variables in an array, you can use the following simple work-around to avoid misleading checks against empty and zero values (and only these "values"!): <?php in_array($value, $my_array, empty($value) && $value !== '0'); ?> The function empty() is the right choice as it turns to true for all 0, null and ''. The '0' value (where empty() returns true as well) has to be excluded manually (as this is handled by in_array correctly!). Examples: <?php $val = 0; $res = in_array($val, array('2007')); ?> leads incorrectly to true where <?php $val = 0; $res = in_array($val, array('2007'), empty($val) && $val !== '0'); ?> leads correctly to false (strict check!) while <?php $val = 2007; $res = in_array($val, array('2007'), empty($val) && $val !== '0'); ?> still correctly finds the '2007' ($res === true) because it ignores strict checking for that value. ---- Server IP: 69.147.83.197 Probable Submitter: 84.189.100.161 ---- Manual Page -- http://www.php.net/manual/en/function.in-array.php Edit -- https://master.php.net/note/edit/78524 Del: integrated -- https://master.php.net/note/delete/78524/integrated Del: useless -- https://master.php.net/note/delete/78524/useless Del: bad code -- https://master.php.net/note/delete/78524/bad+code Del: spam -- https://master.php.net/note/delete/78524/spam Del: non-english -- https://master.php.net/note/delete/78524/non-english Del: in docs -- https://master.php.net/note/delete/78524/in+docs Del: other reasons-- https://master.php.net/note/delete/78524 Reject -- https://master.php.net/note/reject/78524 Search -- https://master.php.net/manage/user-notes.php