Question

我真的对以下问题感到绝望：我想设置一个限制人们注册这个脚本（16）。好吧，我尝试和搜索，我放弃了！有人知道如何设置它只是简单地编辑脚本，以便我可以复制粘贴它。

这是脚本

<?php
$error_message = "";
if ($_SERVER['REQUEST_METHOD'] == 'POST')
{
   $action = isset($_POST['action']) ? $_POST['action'] : '';
   $mysql_server = 'X';
   $mysql_username = 'X';
   $mysql_password = 'X';
   $mysql_database = 'X';
   $mysql_table = 'LOL';

   $success_page = 'X';
   if ($action == 'signup')
   {
      $newusername = $_POST['username'];
      $newemail = $_POST['email'];
      $newpassword = $_POST['password'];
      $confirmpassword = $_POST['confirmpassword'];
      $newfullname = $_POST['fullname'];
      if ($newpassword != $confirmpassword)
      {
         $error_message = 'Password and Confirm Password are not the same!';
      }
      else
      if (!ereg("^[A-Za-z0-9_!@$]{1,50}$", $newusername))
      {
         $error_message = 'Team name is not valid, please check and try again!';
      }
      else
      if (!ereg("^[A-Za-z0-9_!@$]{1,50}$", $newpassword))
      {
         $error_message = 'Password is not valid, please check and try again!';
      }
      else
      if (!ereg("^.+@.+\..+$", $newemail))
      {
         $error_message = 'Email is not a valid email address. Please check and try again.';
      }
         $db = mysql_connect($mysql_server, $mysql_username, $mysql_password);
         mysql_select_db($mysql_database, $db);
         $sql = "SELECT username FROM ".$mysql_table." WHERE username = '".$newusername."'";
         $result = mysql_query($sql, $db);
         if ($data = mysql_fetch_array($result))
      {
         list($username, $password, $email, $fullname) = explode('|', trim($line));
         if ($newusername == $username)
         {
            $error_message = 'Team name already used. Please select another username.';
         }
      }
      if (empty($error_message))
      {
         $crypt_pass = md5($newpassword);
         $sql = "INSERT `".$mysql_table."` (`username`, `password`, `fullname`, `email`, `active`) VALUES ('$newusername', '$crypt_pass', '$newfullname', '$newemail', 1)";
         $result = mysql_query($sql, $db);
         mysql_close($db);
         $mailto = $newemail;
         $subject = 'X';
         $message = 'X';
         $message .= "\r\nX";
         $message .= "\r\n ";
         $message .= "\r\nTeam name for the upcoming tournament: ";
         $message .= $newusername;
         $message .= "\r\nYour password: ";
         $message .= $newpassword;
         $message .= "\r\n ";
         $message .= "\r\n ";
         $message .= "\r\nX";
         $message .= "\r\nX";
         $header  = "From: X"."\r\n";
         $header .= "Reply-To: X"."\r\n";
         $header .= "MIME-Version: 1.0"."\r\n";
         $header .= "Content-Type: text/plain; charset=utf-8"."\r\n";
         $header .= "Content-Transfer-Encoding: 8bit"."\r\n";
         $header .= "X-Mailer: PHP v".phpversion();
         mail($mailto, $subject, $message, $header);
         header('Location: '.$success_page);
         exit;
      }
   }
}
?>

Answer 1

在对用户进行任何形式的验证之前，请运行查询：

SELECT COUNT(*) AS 'num_users' FROM users_table;

然后获取'num_users'列，并且;

if ($row['num_users'] >= $max_users)

然后向用户显示相应的文本并退出脚本（或将用户重定向到某个适当的抱歉页面）。

Answer 2

请按照以下步骤操作：

1）取一个变量来定义你的极限。我带

 $limitData = 16

2）查询用户表

 $result = mysql_query("SELECT * FROM USERS");
 $num_rows = mysql_num_rows($result);

3）这个$ num_rows会告诉你已经注册了多少。现在插入新数据的最后一步，你必须放一个条件

if($limitData > $num_rows)
{
    //put your insert query in this section
}

PHP Mysql最大寄存器大小？

2 个答案: