How does thinkphp determine the request method?

ThinkPHP is an excellent PHP framework that provides a wealth of functions and methods to help developers implement various functions. Among them, judging the request method is one of the very common functions in web development. In this article, we will introduce how to use ThinkPHP to determine the HTTP request method.

Overview of HTTP request methods

In the HTTP protocol, the request method (Request Method) represents the action that the client (usually a web browser) wants the server to perform. The HTTP protocol currently defines 8 request methods, which are:

• GET: Request a resource from the server, and the server returns the resource;
• POST: Submit data to the server, and the server processes it This data;
• PUT: Update resources on the server;
• DELETE: Delete resources on the server;
• HEAD: Get the server's response header information for resources without Return the entity content of the resource;
• OPTIONS: Query the request method supported by the server for the resource;
• CONNECT: Establish a network connection tunnel for the proxy server;
• TRACE: Tracking Communication path between servers.

Among them, GET and POST request methods are the most commonly used.

Methods to determine the request method in ThinkPHP

In the ThinkPHP framework, we can use the method provided by the Request object to determine the current HTTP request method. The Request object is a system-level class. We can operate the current HTTP request by calling the methods provided by the object. The following are some commonly used methods to determine the HTTP request method:

1. isPost()

This method is used to determine whether the current request is a POST request. Returns true if the current request is a POST request, false otherwise. The sample code is as follows:

use think\facade\Request;

if (Request::isPost()) {
    // do something...
}

2. isGet()

This method is used to determine whether the current request is a GET request. Returns true if the current request is a GET request, false otherwise. The sample code is as follows:

use think\facade\Request;

if (Request::isGet()) {
    // do something...
}

3. isPut()

This method is used to determine whether the current request is a PUT request. Returns true if the current request is a PUT request, false otherwise. The sample code is as follows:

use think\facade\Request;

if (Request::isPut()) {
    // do something...
}

4. isDelete()

This method is used to determine whether the current request is a DELETE request. Returns true if the current request is a DELETE request, false otherwise. The sample code is as follows:

use think\facade\Request;

if (Request::isDelete()) {
    // do something...
}

5. isAjax()

This method is used to determine whether the current request is an Ajax request. Returns true if the current request is an Ajax request, false otherwise. The sample code is as follows:

use think\facade\Request;

if (Request::isAjax()) {
    // do something...
}

6. method()

This method is used to obtain the current HTTP request method. The results returned by the method are all in uppercase letters. The sample code is as follows:

use think\facade\Request;

$method = Request::method();

if ($method == 'GET') {
    // do something...
} elseif ($method == 'POST') {
    // do something...
}

To sum up, when we develop using ThinkPHP, we can use the methods provided by the Request object to easily determine the HTTP request method of the current request, and execute different business logic based on the judgment results.

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