How do I use HTTP methods (GET, POST, PUT, DELETE) in PHP?
Jun 21, 2025 am 12:37 AM
The method of judging and processing HTTP requests in PHP can be implemented through $_SERVER['REQUEST_METHOD']. The specific steps are as follows: 1. Use $method = $_SERVER['REQUEST_METHOD'] to obtain the current request method; 2. Use if/elseif to judge GET, POST, PUT or DELETE requests and process them separately; 3. Use $_GET to obtain URL query parameters, and POST data to obtain form submission content through $_POST; 4. PUT and DELETE requests need to read data from the php://input input stream, and can be parsed using parse_str() or json_decode(); 5. Note that forms only support GET and POST. PUT and DELETE are often used for API requests. It is recommended to use php://input to handle the request body uniformly to improve compatibility during development.
Using HTTP methods (GET, POST, PUT, DELETE) in PHP is not complicated. The key is to understand their respective uses and how to receive and process these requests through PHP. Below I will explain how to operate it in a simple and direct way.
How to determine which HTTP request is currently?
PHP provides a hyperglobal variable $_SERVER , where 'REQUEST_METHOD' can be used to determine the HTTP method used by the current request. You can write this way:
$method = $_SERVER['REQUEST_METHOD'];
if ($method === 'GET') {
// Process GET request} elseif ($method === 'POST') {
// Process POST request} elseif ($method === 'PUT') {
// Process PUT request} elseif ($method === 'DELETE') {
// Process DELETE request}This judgment method is very common, especially when writing RESTful-style APIs.
How to handle GET and POST requested data?
The data acquisition method of these two methods is more intuitive:
GET : The data will appear in the query parameters of the URL, which can be obtained through
$_GETin PHP.Sample URL:
http://example.com/?name=John&age=25
In PHP:
$name = $_GET['name']; $age = $_GET['age'];
POST : The data in a form submission or API request is usually placed in the request body, and the value can be obtained using
$_POST.Form example:
<form method="post" action="process.php"> <input type="text" name="username"> <button type="submit">Submit</button> </form>In PHP files:
$username = $_POST['username'];
Note:
$_POSTcan only handle dataapplication/x-www-form-urlencodedandmultipart/form-dataformats. If it is JSON data, the input stream needs to be read manually.
How do PUT and DELETE requests receive data?
These two methods do not have ready-made hyperglobal arrays available like GET and POST, and you need to manually read data from the input stream.
PUT request example:
if ($_SERVER['REQUEST_METHOD'] === 'PUT') { parse_str(file_get_contents("php://input"), $putData); // You can now use $putData['key'] to get the value}DELETE requests are similar:
if ($_SERVER['REQUEST_METHOD'] === 'DELETE') { parse_str(file_get_contents("php://input"), $deleteData); // Use the data in $deleteData}
If you are sending data in JSON format, you can handle it like this:
$data = json_decode(file_get_contents("php://input"), true);Common precautions
- Forms only support GET and POST by default. If you want to use PUT or DELETE, it is usually set in front-end frameworks (such as Vue, React) or AJAX requests.
- Different HTTP methods are suitable for different scenarios:
- GET: used to obtain data
- POST: used to create resources
- PUT: used to update resources
- DELETE: used to delete resources
- If you are developing an API, it is recommended to use
php://inputto parse the request body in a unified manner to avoid relying on$_POST.
Basically that's it. Although it seems a bit too many, once you are familiar with the process, it is still easy to use.
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