";
$valid = false;
}
//判断姓名是否重复
$queryString = "select count(name) as counter from user_70 where name = '$name'";
$rs = mysqli_query($link,$queryString);
$row = mysqli_fetch_assoc($rs);
if($row['counter'] != 0){
// echo "用户". $name."已存在，请换名
";
$userExist = true;
}else{
$userExist = false;
}
if($valid && !$userExist){
//对密码加密
$password_1 = md5($password_1);
//如果验证通过，把注册信息写入表中
$queryString = "insert into user_70(name,password) values('$name','$password_1') ";
mysqli_query($link,$queryString);
echo "恭喜，注册成功!";
}
if($valid && $userExist){
$password_1 = md5($password_1);
$queryString = "update user_70 set password = '$password_1' where name = '$name'";
mysqli_query($link,$queryString);
echo "密码更新成功";
}
}else{
$name = "";
}
?>