How can the presence of [PHPSESSID] [_gat] [_ga] in $_REQUEST be explained in PHP?

The presence of [PHPSESSID] [_gat] [_ga] in $_REQUEST can be explained by the fact that these are commonly used cookies set by PHP sessions and Google Analytics. To prevent these cookies from being included in the $_REQUEST superglobal, it is recommended to use $_GET or $_POST superglobals instead, which are more secure and specific to the request method.

// Use $_GET or $_POST superglobals instead of $_REQUEST
$value = $_GET['value']; // or $_POST['value']