$login_check="demo"; $pwd_check="demo"; if(!isset($login_n)&&!isset($pwd_n)) { echo "<form method=post>"; echo "<html><head><title></title></head><body>\n"; echo "Ëîãèí: <br>\n"; echo "<input type=text name=login_n size=48 value=''><br>"; echo "Ïàðîëü: <br>\n"; echo "<input type=text name=pwd_n size=48 value=''><br>"; echo "<input name=\"Submit\" type=submit value='go' >"; echo "</form>"; echo "</body></html>\n"; exit; } else { if($login_check!==$login_n || $pwd_check!==$pwd_n){ echo "error";exit;} }