$_POST as a function parameter [duplicate]

Question

I've been working on a project for a game (so you'll understand that I can't post the actual script), and I'm cleaning up the code and placing code into functions instead of just after the

if ($_POST['name'] { //code }

Is this the correct method of doing what I'm trying? (I tried, but it broke my system)

if ($_POST['action'] == "actionName") actionName($_POST); //calls function if the $_POST is present
function actionName($_POST) { //code }

Thanks in advance for correct answers!

Answer 1

$_POST is globally accessible. So you don't have to pass to your function:

if ($_POST['action'] == 'actionName') actionName(); 

function actionName() {
    //code using $_POST
}

If you want your function to be able to do what it wants with any array (i.e. other than $_POST), then make the function take a parameter, but don't call it $_POST:

if ($_POST['action'] == 'actionName') actionName($_POST); 

function actionName(parameters) {
    //code using parameters
}