global s power in php...

function add($x,$y){
    global $x,$y;

    dpm($x. ‘below-global‘);
    dpm($y. ‘below-global‘);

    minus($x,$y);
    dpm($x. ‘below-minus‘);
    dpm($y. ‘below-minus‘);
    return $x + $y;

}

function minus($x,$y){
    global $x,$y;
    $x = $x + 9;
    dpm($x . ‘minus‘);
    dpm($y . ‘minus‘);
}

function ben_init(){
    global $x;
    global $y;

    $x = 100;

dpm(add($x,$y = 3));