How to intercept routing in thinkphp

ThinkPHP is a PHP open source framework based on MVC architecture. It is currently one of the most popular PHP frameworks in China and has been widely used in many websites and applications. In actual development, we often need to intercept access routes in order to control and manage the paths and ensure the security and stability of the website. In the process of intercepting routes, some errors and exceptions often occur. This article will introduce how to use the ThinkPHP framework to intercept routes and solve common routing errors.

1. What is route interception?

Route interception refers to the management and control of access paths to protect the security and stability of the website. In actual development, we often filter and prohibit access paths to avoid some security risks and attacks. Route interception can control accessed URLs and filter some invalid URLs to make website access more secure and reliable.

2. ThinkPHP route interception implementation method

The following is the ThinkPHP method to implement route interception:

1. By configuring routing rules in the application configuration file config.php;
2. By intercepting and judging before the controller is called;
3. By intercepting and judging before routing.

The following is a detailed introduction to how to use these three methods:

1. By configuring routing rules in the application configuration file config.php

In ThinkPHP, the routing rules are Configured in the application configuration file config.php. In config.php, find the configuration item ‘URL_ROUTE_RULES’ and define routing rules in this configuration item. The specific operations are as follows:

return [
    'URL_ROUTE_RULES' => [
        'login'             => 'Index/login',
        'register'          => 'Index/register',
        'user/:id'          => 'User/index',
        'user/add'          => 'User/add',
        'user/edit/:id'     => 'User/edit',
        'user/delete/:id'   => 'User/delete',
    ],
];

2. By intercepting and judging before the controller is called

In ThinkPHP, we can use the controller extension function to implement routing interception. In the controller extension function, we can use the before method to intercept the access request and process it. The following conditions need to be met to use the before method:

1. The controller needs to inherit the \think\Controller class;
2. The before method needs to return a bool type value, true means the interception is successful, false means the interception failed. .

The specific operations are as follows:

namespace app\index\controller;

use think\Controller;

class Index extends Controller
{
    protected function before()
    {
        if(request()->action() == "index"){
            if(!session('loginTime')){
                return false;
            }
        }
        return true;
    }

    public function index()
    {
        return "hello world";
    }

    public function login()
    {
        return $this->fetch();
    }
}

3. By intercepting and judging before routing

In ThinkPHP, we can use the routing extension function to implement routing interception. In the routing extension function, we can use the before method to intercept access requests and process them. The following conditions need to be met to use the before method:

1. The route needs to define a closure function;
2. The before method needs to return a bool type value, true means the interception is successful, false means the interception failed.

The specific operations are as follows:

use think\Route;

Route::rule('/', function () {
    return 'hello world!';
}, 'GET')->before(function () {

    if(!session('loginTime')){
        return false;
    }
    return true;
});

3. Common routing errors and solutions

1. The requested method is not allowed

Cause of error: Requested The method is incorrect, such as using a get request to access the post route.

Solution: Check whether the route definition and request method are consistent.

2. Method definition not found

Cause of error: The request path does not match the method, or the routing rule definition is wrong.

Solution: Check whether the routing rules and the defined method names are consistent.

3. The controller does not exist

Cause of error: The corresponding controller cannot be found.

Solution: Check whether the controller class name and file name are consistent and in the correct location.

4. Missing parameters

Cause of error: Necessary parameters are missing in the request path.

Solution: Check whether the routing rules are correctly defined and pass the correct parameters.

5. "Access Denied" error

Cause of error: Insufficient permissions, or you have logged out.

Solution: Check information such as permission settings and login status.

Note: The above errors are only common errors, and specific errors must be investigated according to specific circumstances.

Conclusion

Route interception is an important measure to ensure the security and stability of the website. When learning the ThinkPHP framework, you must master the use and interception of routes. This article introduces three methods of route interception in ThinkPHP, as well as solutions to common routing errors. I hope it will be helpful to everyone.

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