if(preg_match("/[.0-9]+/", isset($_SERVER['REMOTE_ADDR']) )) $ip=$_SERVER['REMOTE_ADDR'];
Пойдет такое для админки?
if(preg_match("/[a-zA-Z0-9]{3,10}/", $_POST['password']))$password=base64_encode($_POST['password']);
artphp.ru
if(preg_match("/[.0-9]+/", isset($_SERVER['REMOTE_ADDR']) )) $ip=$_SERVER['REMOTE_ADDR'];
if(preg_match("/[a-zA-Z0-9]{3,10}/", $_POST['password']))$password=base64_encode($_POST['password']);