How to use PHP Developer City to implement user account logout and revocation function

How to use PHP Developer City to realize the user account cancellation and revocation function

In modern e-commerce systems, user account cancellation is an important function. Users may wish to cancel their accounts for various reasons, such as personal privacy protection, account security, etc. However, sometimes users may regret after canceling their account and wish to reverse the cancellation. In order to achieve this function, we can use PHP Developer City.

First, we need to design the database to store user information and user logout records. Suppose we have a database table named users, which contains the following fields: id (user ID), username (user name), password (password), email (mailbox), etc. We also need a data table named deactivation_requests to record the user's logout request. The table contains the following fields: id (request ID), user_id (user ID), reason (logout reason), status (request status), etc.

Next, we need to add the logout function to the user account settings page. When the user chooses to log out of their account, we need to write their logout request into the deactivation_requests table. We can use a simple HTML form to achieve this:

<form action="deactivate.php" method="post">
    <input type="hidden" name="user_id" value="<?php echo $user_id; ?>">
    <input type="text" name="reason" placeholder="请输入注销原因">
    <input type="submit" value="注销账号">
</form>

When the user clicks the "Logout Account" button, the form is submitted to the deactivate.php page for processing. In deactivate.php, we need to verify the user's identity first to ensure that only legitimate users can log out of their accounts. We then insert the user's logout request into the deactivation_requests table and set the request status to pending review.

// deactivate.php
<?php
session_start();
$user_id = $_POST['user_id'];
$reason = $_POST['reason'];

// 验证用户身份
if ($_SESSION['user_id'] != $user_id) {
    echo "非法操作";
    exit;
}

// 将注销请求插入deactivation_requests表中
// 设置请求状态为待审核
$status = "待审核";
$query = "INSERT INTO deactivation_requests (user_id, reason, status) VALUES ('$user_id', '$reason', '$status')";
$result = mysqli_query($connection, $query);

if ($result) {
    echo "注销请求已提交";
} else {
    echo "注销请求提交失败";
}

?>

When the administrator reviews and approves the user's logout request, we will update the status of the request in the deactivation_requests table to approved and delete the user information from the users table. We can use another PHP script to achieve this functionality.

// approve_deactivation.php
<?php
$request_id = $_POST['request_id'];

// 将请求状态设置为已批准
$status = "已批准";
$query = "UPDATE deactivation_requests SET status = '$status' WHERE id = '$request_id'";
$result = mysqli_query($connection, $query);

if ($result) {
    // 从users表中删除用户信息
    $query = "DELETE FROM users WHERE id = (SELECT user_id FROM deactivation_requests WHERE id = '$request_id')";
    $result = mysqli_query($connection, $query);

    if ($result) {
        echo "用户已注销";
    } else {
        echo "用户注销失败";
    }
} else {
    echo "注销请求处理失败";
}

?>

Finally, if users regret after logging out of their account and wish to revoke the logout request, they can submit a logout revocation request to the administrator. We can implement this function in a similar way, just add a new data table revocation_requests to record the user's revocation request.

To sum up, by using PHP Developer City, we can realize the user account logout and logout cancellation functions. By recording users' logout and revocation requests in the database, and adding corresponding forms and processing scripts to some key pages, we can make it easier for users to manage and control their accounts. Of course, in the actual development process, we also need to consider more security and legality verification to ensure the safety and reliability of the account logout and revocation function.

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