# re: php+ajax注册验证 回复 更多评论
2008-07-07 11:01 by
用户名:
$conn = mysql_connect("localhost", "root", "123") or die("cannot connect database"); $user = $_GET["user_name"]; $querySQL = "SELECT * FROM users WHERE user_name = '".$user."'"; mysql_select_db("memtech", $conn); $rs = mysql_query($querySQL, $conn); $rs_cnt = mysql_num_rows($rs); if($rs_cnt==1) { echo "该用户名已被人使用"; } else if($rs_cnt==0) { echo "该用户名未被人使用"; } else echo "用户名验证程序出错"; ?>