Online PHP editor | refs for C5KPG

<?php include "config.php"; if(empty($_REQUEST["action"])) $template->display("join.html"); else { $username=$_REQUEST["username"]; $password=$_REQUEST["password"]; $email=$_REQUEST["email"]; $sponsor = @$_COOKIE["sponsor_id"]; if (!preg_match("^[a-zA-Z0-9.-_]+\@[a-zA-Z0-9.-_]\+.[a-zA-Z0-9.-_]+$",$email)); die ("Not a valid email format!"); if (!preg_match("^[A-Za-z0-9_]+$",$username)); die ("Username contains an unallowed characters"); $num=mysql_num_rows(mysql_query("select id from members where username ='$username'")); if ($num>0) die ("Username already taken"); $template->assign("custom_key",NEW_MEMBER . "|$username|$password|$email|$sponsor"); $template->assign("username",$username); $template->assign(array("aftersignup"=>$aftersignup, "cancel_page"=>$cancel_page)); $template->display("order.html"); }