<?php
$totalprice_posts = get_posts('post_type=items&author=".$thisauthorID."&tag='.$thispostID.'&numberposts=-1');
$totalprice_array = array();
foreach ($totalprice_posts as $post) {
$productprice = get_post_meta($post->ID, "productprice", true);
$productquantity = get_post_meta($post->ID, "productquantity", true);
$totalproductprice = ($productprice * $productquantity);
array_push($totalprice_array, $totalproductprice);
}
echo implode(',', $totalprice_array);
echo array_sum($totalprice_array);
?
