How to implement thinkphp login detection

1: What is ThinkPHP login detection

ThinkPHP login detection means that when the user tries to log in, the system will verify whether the information entered by the user is consistent with the system Corresponding to the user data in , if the verification is passed, authorization processing can be performed, and then the corresponding page content is displayed. This process is integrated using the libraries and functions provided by the ThinkPHP framework.

2: What is the process of ThinkPHP login detection

1. The user enters the username and password on the login page and submits the login request.

2. The program receives the login request and verifies the username and password. If the verification passes, start the session.

3. The program will record the user's login status and then transfer the user to the authorization page.

4. The program will check the user's role and permissions. If the user's permissions meet the specified requirements, the page content can be displayed.

5. After the user allows authorization, the program will load the page content and transmit the content back to the client.

3: How ThinkPHP performs login detection

In ThinkPHP, the session and cookie mechanisms can be used to implement login verification. The specific steps are as follows:

1. Save the user data logged in by the user in the session.

2. In controller and template pages that require permission verification, use session to determine whether the user has logged in.

3. For pages that need to check access permissions, you can use the acl plug-in in the controller to check.

4. Call the user model in the PHP code to check user roles and permissions to determine whether access is allowed.

Four: Example Demonstration of ThinkPHP Login Detection

Assuming that we already have a user login page, we can use the following method in ThinkPHP Implement login detection.

1. User information verification needs to be performed in the controller of the login page. If passed, the user information is saved to the session. This process can be accomplished with the code $this->session('user', $user) .

2. Define a controller class and perform permission checks in it. Authorization check can be done in a manner similar to the following:

if (!$this->checkAccess($controller . '/' . $action)) {
return $this->error('没有访问权限');
}

Among them, the checkAccess function will check user roles and permissions in the background. Returns true if the check passes.

3. In the controller, we need to define the method to check access permissions. Generally, the following implementation methods can be used.

protected function checkAccess($path) {
$access = $this->getAccessList();
if (!isset($access['allow'][$path])) {
return false;
}
return true;
}

The getAccessList function returns a list of roles and permissions.

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