Hi @chanshaw
Hmm… Please change the method query_posts() and use get_posts() instead and change your code to the following:
function load_highest_order_number() {
$args = array(
'meta_key' => 'order_number',
'cat' => 7);
$posts = get_posts($args);
foreach ($posts as $post):
echo get_field('order_number', $post->ID);
endforeach;
... //
}
Have a look at the documentation of get_posts() and query_posts() for more information on this. Here are the links:
https://codex.wordpress.org/Function_Reference/query_posts
https://codex.wordpress.org/Template_Tags/get_posts
