note 90690 added to language.types.array

A simple function to check if you can use your variable as an array offset validly and without getting it typecasted. <?php function is_safe_offset($offset) { return array_pop(@array_flip(array($offset => 0))) === $offset; } $a = 8; var_dump(is_safe_offset($a)); // true $b = '8'; var_dump(is_safe_offset($b)); // false $c = '08'; var_dump(is_safe_offset($c)); // true $d = 'foo'; var_dump(is_safe_offset($d)); // true $e = 3.8; var_dump(is_safe_offset($e)); // false $f = false; var_dump(is_safe_offset($f)); // false $g = null; var_dump(is_safe_offset($g)); // false $h = array(); var_dump(is_safe_offset($h)); // false $i = new StdClass; var_dump(is_safe_offset($i)); // false ?> ---- Server IP: 213.249.64.162 Probable Submitter: 82.92.197.212 ---- Manual Page -- http://www.php.net/manual/en/language.types.array.php Edit -- https://master.php.net/note/edit/90690 Del: integrated -- https://master.php.net/note/delete/90690/integrated Del: useless -- https://master.php.net/note/delete/90690/useless Del: bad code -- https://master.php.net/note/delete/90690/bad+code Del: spam -- https://master.php.net/note/delete/90690/spam Del: non-english -- https://master.php.net/note/delete/90690/non-english Del: in docs -- https://master.php.net/note/delete/90690/in+docs Del: other reasons-- https://master.php.net/note/delete/90690 Reject -- https://master.php.net/note/reject/90690 Search -- https://master.php.net/manage/user-notes.php