Remember,
Although $_SERVER["REQUEST_METHOD"] is initially built with GET, POST, PUT, HEAD in mind, a server can allow more.
This may be important if you're building a RESTful interfaces that will also use methods such as PATCH and DELETE.
Also important as a security risk as a possible point of injection. In the event of building something acting based on REQUEST_METHOD, it's recommended to put it in a switch statement.
<?php
switch ($_SERVER["REQUEST_METHOD"]){
case "PUT":
foo_replace_data();
break;
case "POST":
foo_add_data();
break;
case "HEAD";
foo_set_that_cookie();
break;
case "GET":
default:
foo_fetch_stuff()
break;
}
?>
