note 68955 modified in function.isset by thiago

fyi: you *cannot* do assignments inside of the isset() function. although you *can* while inside of other functions such as is_null(). <?php if (isset($var = $_GET['key'])) echo 'whatever'; //this will throw an error :( if (is_null($var = $_GET['key'])) echo 'whatever'; //this will not :) ?> hope someone finds this useful. --was-- fyi: you *cannot* do assignments inside of the isset() function. although you *can* while inside of other functions such as is_null(). if (isset($var = $_GET['key'])) echo 'whatever'; //this will throw an error :( if (is_null($var = $_GET['key'])) echo 'whatever'; //this will not :) hope someone finds this useful. http://php.net/manual/en/function.isset.php