<?php

$cart['cart'] = [
	123 => 5,
	5521 => 1,
	9001 => 10,
	404 => 3
	];

echo "Product\tQty\n";
foreach($cart['cart'] as $product_code => $qty){
    echo str_pad($product_code,5," ",STR_PAD_RIGHT) . "\t$qty\n";
}