How to disable get request using php

PHP is a popular server-side programming language that is widely used to build web applications. When developing web applications using PHP, it is very important to ensure security. Since HTTP requests include GET and POST, and since the GET request contains the request parameters sent by the client in the URL, the security of the web application can be enhanced by prohibiting the GET request. In this article, we will discuss how to suppress GET requests through PHP.

Step one: Query the request type

When writing a PHP script, we can use the $_SERVER['REQUEST_METHOD'] parameter to determine the type of the current request. If it is a GET request, the value of this parameter will be 'GET', if it is a POST request, its value will be 'POST'. Therefore, we can add the following judgment statement at the beginning of the code:

if ($_SERVER['REQUEST_METHOD'] == 'GET') {
  header('HTTP/1.1 405 Method Not Allowed');
  exit;
}

This code first queries whether the type of the current request is GET. If so, it will return the 'HTTP/1.1 405 Method Not Allowed' error code. and stop the execution of the script.

Step 2: Disable the $_GET array

In PHP, $_GET is an associative array that contains the parameters passed in the request URL. To prevent malicious GET requests, we can use the unset() function at the beginning of the script to set the $_GET array to an empty array:

$_GET = array();

This will deactivate the $_GET array and prevent anyone from passing parameters in the URL .

Step 3: Use $_POST instead of $_GET

In PHP, we can use the $_POST array to store the data in the POST request. If we need to send data to a PHP page and want it not to be accessible through a GET request, we can use a POST request instead of a GET request.

For example, if you previously used parameters in the URL to pass search keywords, you can now use a hidden field instead:

<form method="post" action="search.php">
  <input type="text" name="keyword">
  <input type="submit" value="Search">
</form>

In this example, use a POST request instead of a GET request Make a search request. In PHP pages, use $_POST['keyword'] to get search keywords instead of using $_GET['keyword'].

In summary, prohibiting GET requests is an effective method to enhance the security of web applications. Through the above 3 steps, we can effectively prevent malicious users from using GET requests to attack our applications.

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