Question

所以我有一个用户名和密码表格将数据发布到这个process.php文件。但是我的代码陷阱中的错误表明mysql查询有问题：“用户名和密码不匹配。我们将在两秒钟内将您带回登录页面。”

md5工作正常，我检查了数据库表中的所有行以及它应该是什么。有什么建议？谢谢戴夫。

<?php

//Code DavidMaitland.me 2011
//Process data from the login form

require('database.php');

$username = mysql_real_escape_string($_POST["username"]);
$password = mysql_real_escape_string(md5($_POST["password"]));

$client_query = mysql_query("SELECT * FROM clients WHERE client_username='$username' and client_password='$password'") or die (mysql_error());
$client_data = mysql_fetch_array($client_query, MYSQL_ASSOC);

if(mysql_num_rows($client_data) == 1) {

    session_start();
    $_SESSION['client_id'] = $client_data['id'];

    header('Location: account.php');

} else {

    echo "The username and password don't match. We will take you back to the login page in two seconds.";
    header('Refresh: 2; url=index.php');
}

?>

Answer 1

更改此行：

if(mysql_num_rows($client_data) == 1) {

到

if(mysql_num_rows($client_query) == 1) {

mysql_num_rows()需要mysql_query()来电的直接结果。

Answer 2

您需要使用mysql_num_rows($client_query)代替mysql_num_rows($client_data)。

Answer 3

更改此部分

if(mysql_num_rows($client_query) == 1) {

    session_start();
    $_SESSION['client_id'] = $client_data['id'];

    header('Location: account.php');

} else {

    echo "The username and password don't match. We will take you back to the login page in two seconds.";
    header('Refresh: 2; url=index.php');
}

由于您在获取的数组上通过mysql_num_rows计算行数，因此您应该在资源上计算它（$ client_query）

PHP帮助，不知道为什么这不起作用

3 个答案: