Unable to add to array from function using arguments

Question

I have a function getPrice($_SESSION['external']);

function getPrice($position)
    {
        //Here I perform SQL functions using $position['arraykey']
        //This works

        //Here I want to add to the array
        //This doesn't work
        $position[0]['pricing'] = $sql_result;
    }

When I use $position it doesn't add to the array, but when I use $_SESSION['external'] it works fine.

I'm not sure why $position works in the SQL query part of my function but one line bellow when I try to add the result to the array, it doesn't.

Answer 1

You have to pass the $position variable by reference Like below:

function getPrice(&$position)
    {
        //Here I perform SQL functions using $position['arraykey']
        //This works

        //Here I want to add to the array
        //This doesn't work
        $position[0]['pricing'] = $sql_result;
    }