<?php
function compareArray($parameter){
    $products = array(
        'paper' => array(
            'copier' => "A",
            'inkjet' => "Inkjet Printer",
            'laser' => "Laser Printer",
            'photo' => "Photographic Paper"),
        'pens' => array(
            'copier' => "B",
            'inkjet' => "Highlighters",
            'marker' => "Markers"),
        'misc' => array(
            'copier' => "C",
            'inkjet' => "Adhesives",
            'clips' => "Paperclips")
    );

    $a = array();
    echo "<pre>";
    foreach($products as $section => $items)
        array_push($a,$items[$parameter]);
    print_r($a);
    $b = $a;
    sort($b);
    print_r($b);
    if ($a == $b){
        print_r("Arrays are the same");
        return true;}
    else{
        print_r("Arrays are different");
        return false;
    }
    echo "</pre>";
}
compareArray(copier);
compareArray(inkjet);
 ?>