How to detect a request type in PHP?

To detect the request type (i.e., whether the request is a GET, POST, PUT, DELETE, etc.) in PHP, you can use the $_SERVER['REQUEST_METHOD'] variable. This variable contains the request method as a string, such as 'GET', 'POST', 'PUT', 'DELETE', etc.

Here is an example of how to use the $_SERVER['REQUEST_METHOD'] variable to detect the request type:

<?php

if ($_SERVER['REQUEST_METHOD'] === 'GET') {
    // Handle GET request
} elseif ($_SERVER['REQUEST_METHOD'] === 'POST') {
    // Handle POST request
} elseif ($_SERVER['REQUEST_METHOD'] === 'PUT') {
    // Handle PUT request
} elseif ($_SERVER['REQUEST_METHOD'] === 'DELETE') {
    // Handle DELETE request
}

In this example, the $_SERVER['REQUEST_METHOD'] variable is checked against the different request methods using the if statement. If the request method is 'GET', the code in the first block will be executed; if the request method is 'POST', the code in the second block will be executed, and so on.

You can also use the switch statement to detect the request type, like this:

<?php

switch ($_SERVER['REQUEST_METHOD']) {
    case 'GET':
        // Handle GET request
        break;
    case 'POST':
        // Handle POST request
        break;
    case 'PUT':
        // Handle PUT request
        break;
    case 'DELETE':
        // Handle DELETE request
        break;
}

Note that the $_SERVER['REQUEST_METHOD'] variable is case-sensitive, so you should use the exact request method strings (e.g., 'GET', 'POST', etc.) when checking it.