Question

Is there a best practice / recommendation when I want to use a variable declared outside of a function when it comes to using:

1. global $myVar
2. $GLOBALS['myVar']

Thank you.

Answer 1

What you should really do is pass the variable to the function instead of using a global at all.

An example how to change a variable outside of the function via passing it as reference parameter:

function myFunc(&$myVar)
{
    $myVar = 10;
}

$foo = 0;
myFunc($foo);
var_dump($foo); // yields 10