note 89191 added to function.array-key-exists

Below is a more efficient and useful case-insensitive array_key_exists function. More useful in the sense that it returns the matching key. /** * Case insensitive version of array_key_exists. * Returns the matching key on success, else false. * * @param string $key * @param array $search * @return string|false */ function array_key_exists_nc($key, $search) { if (array_key_exists($key, $search)) { return $key; } if (!(is_string($key) && is_array($search) && count($search))) { return false; } $key = strtolower($key); foreach ($search as $k => $v) { if (strtolower($k) == $key) { return $k; } } return false; } /* Test code: */ $array = array( 'taste' => 'sweet', 'cOlOr' => 'yellow', 'foo', 'bar', ); $keys = array( 'Color', 'google', 0, ); foreach ($keys as $key) { print "\t$key: "; var_dump(array_key_exists_nc($key, $array)); } /* Output: Color: string(5) "cOlOr" google: bool(false) 0: int(0) */ ---- Server IP: 83.137.20.135 Probable Submitter: 80.101.188.146 ---- Manual Page -- http://www.php.net/manual/en/function.array-key-exists.php Edit -- https://master.php.net/note/edit/89191 Del: integrated -- https://master.php.net/note/delete/89191/integrated Del: useless -- https://master.php.net/note/delete/89191/useless Del: bad code -- https://master.php.net/note/delete/89191/bad+code Del: spam -- https://master.php.net/note/delete/89191/spam Del: non-english -- https://master.php.net/note/delete/89191/non-english Del: in docs -- https://master.php.net/note/delete/89191/in+docs Del: other reasons-- https://master.php.net/note/delete/89191 Reject -- https://master.php.net/note/reject/89191 Search -- https://master.php.net/manage/user-notes.php