修改密码功能 - change password function

我把下面的代码放在一起。但是由于某些原因，它拒绝更新数据库，并且无论输入什么，它都一直回显$error "Your current password is incorrect"。

下面是changepassword.php的主要代码

    <?php 
include 'core/init.php';  //connection to database and checks user sessions
protect_page(); //useres not loged in cannot access this page
if (empty($_POST) === false) {
    $required_fields = array('current_password', 'password', 'password_again');
    foreach($_POST as $key=>$value) {
        if (empty($value) && in_array($key, $required_fields) === true) {
            $errors[] = 'All fields marked with an * are required.'; //check that all fields are completed
            break 1;
        }
    }
    if (md5($_POST['current_password']) === $user_data['password']) { //if equal to current password
        if (trim($_POST['password']) !== trim($_POST['password_again'])) {
            $errors[] = 'Your new passwords do not match';
        } else if (strlen($_POST['password']) < 6) {
            $errors[] = 'Your password must be at least 6 characters';
        }
    } else {
        $errors[] = 'Your current password is incorrect';   //else append error
    }
}
include 'includes/overall/header.php'; 
?>
<h1>Change Password</h1>
<p>Change your account password here.</p>
<?php
if (isset($_GET['success']) && empty($_GET['success'])) {
    echo 'Your password has been changed';
} else {
    if (empty($_POST) === false && empty($errors) === true) {
        change_password($session_user_id, $_POST['password']);
        header('Location: changepassword.php?success');
    } else if (empty($errors) === false) {
        echo output_errors($errors);
    }
    ?>
    <form action="" method="post">
        <ul>
        <li>
            Current Password*:<br>
            <input type="password" name"current_password">
        </li>
        <li>
            New Password*:<br>
            <input type="password" name"password">
        </li>
        <li>
            New Password Again*:<br>
            <input type="password" name"password_again">
        </li>
        <li>
            <input type="submit" name="Change Password" />
        </li>
        </ul>
    </form>
<?php 
}
include 'includes/overall/footer.php'; ?>

下面是changepassword函数

//change password function
function change_password($membersID, $password) {
    $membersID = (int)$membersID;
    $password = md5($password);
    //update password in database
    mysql_query("UPDATE`members` SET`password` = '$password' WHERE`membersID` = $membersID");   
}

user_data在这里声明

//user data variable to pass in sessionID and thus pass in their other details
if (logged_in() === true) {
    $session_user_id = $_SESSION['membersID']; //picking up the particular user
    $user_data = user_data($session_user_id, 'membersID', 'username','password', 'forename', 'surename', 'email', 'age'); //picks up the fields declared here - MAKE SURE TO PASS ALL paramameters you need to output.
    if (user_active($user_data['username']) === false) {
        session_destroy();
        header('Location: index.php');
        exit();
    }
}

对不起，我的第一个答案是错误的，但是关于MD5的警告仍然有效:

请记住，你的密码模式是非常不安全的，有一些重要的地方你应该改进。

哈希函数MD5不适合对密码进行哈希，因为它的速度太快了，不如使用慢速的密钥派生函数BCrypt。我想邀请你，在我的
只有在没有的情况下才可以直接比较密码哈希使用了盐。无盐MD5散列并不比存储安全多少明文密码。用少于7个字符的密码破解你的整个数据库只需要几秒钟。
mysql*函数已弃用，建议使用PDO或mysqli代替。请记住，通常您必须在SQL语句(准备语句或mysqli_real_escape_string())中转义字符串值。你的例子是安全的，因为MD5的输出总是安全的。

查询缺少引号。

function change_password($membersID, $password) {
    $membersID = (int)$membersID;
    $password = mysql_real_escape_string(md5($password));
    //update password in database
    mysql_query("UPDATE members SET password = '$password' WHERE membersID = '$membersID';");   
    if (mysql_affected_rows > 0) {
        return true;
    } else {
        return false;
    }
}

if (empty($_POST) === false && empty($errors) === true) {
    if(change_password($session_user_id, $_POST['password'])) {
        // Redirect if change_password returns true
        header('Location: changepassword.php?success');
    } else {
        // Give some error message
    }
} else if (empty($errors) === false) {
    echo output_errors($errors);
}

尝试这些更改，如果change_password函数返回false，我不知道你想用什么方式处理错误