Center Elements

<?php
function center_element_position($numberOfElements, $padding, $dimensions){
    //int, int, array(x,y)
    $screenHeight = 500;
    $screenWidth = 300;

    $adder = $dimensions[1]+$padding;
    $net_height = $numberOfElements*$dimensions[1]+($numberOfElements -1)*$padding;
    $start_height = floor(($screenHeight - $net_height)/2);
    for($x = 0; $x < $numberOfElements; $x++){
        $output[$x]['y'] = $start_height + $adder*$x;
        $output[$x]['x'] = floor(($screenWidth - $dimensions[0])/2);
    }
    return $output;
}

var_dump(center_element_position(10, 5, array(10, 5)));