How can the variables_order parameter be used to control the priority of $_REQUEST in PHP?

The `variables_order` parameter in PHP can be used to control the priority of the superglobal arrays, including `$_REQUEST`. By setting the `variables_order` parameter in the php.ini file, you can determine the order in which PHP looks for variables when populating the `$_REQUEST` array. This can be useful in cases where you want to prioritize values from `$_GET`, `$_POST`, or `$_COOKIE` over others.

// Set the variables_order parameter in php.ini file
variables_order = "GPCS"

// Example code to demonstrate the priority of $_REQUEST based on variables_order
echo $_REQUEST['example']; // Will first look for 'example' in $_GET, then $_POST, $_COOKIE, and finally $_SERVER