php.zip_fifteen2nd_服务器登录页面

<?php if(isset($_POST["Submit"]) && $_POST["Submit"] == "注册") { $user = $_POST["username"]; $psw = $_POST["password"]; $psw_confirm = $_POST["confirm"]; if($user == "" || $psw == "" || $psw_confirm == "") { echo "<script>alert('请确认信息完整性！'); history.go(-1);</script>"; } else { if($psw == $psw_confirm) { mysql_connect("localhost","root","DY&HJ1314"); //连接数据库 mysql_select_db("mysql"); //选择数据库 mysql_query("set names 'gdk'"); //设定字符集 $sql = "select username from user where username = '$_POST[username]'"; //SQL语句 $result = mysql_query($sql); //执行SQL语句 $num = mysql_num_rows($result); //统计执行结果影响的行数 if($num) //如果已经存在该用户 { echo "<script>alert('用户名已存在'); history.go(-1);</script>"; } else //不存在当前注册用户名称 { $sql_insert = "insert into user (username,password,phone,address) values('$_POST[username]','$_POST[password]','','')"; $res_insert = mysql_query($sql_insert); //$num_insert = mysql_num_rows($res_insert); if($res_insert) { echo "<script>alert('注册成功！'); history.go(-1);</script>"; } else { echo "<script>alert('系统繁忙，请稍候！'); history.go(-1);</script>"; } } } else { echo "<script>alert('密码不一致！'); history.go(-1);</script>"; } } } else { echo "<script>alert('提交未成功！'); history.go(-1);</script>"; } ?>