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Yeee-haw. Worked like a charm!! Thank you SO much, please let me know if I can do anything to help you in the future.

Finally got around to trying this out and what was taking me hours wound up taking about 10 minutes. Many thanks again.

Humm, let me give that a try. ISBN is the custom field.

And yes, if I’ve left the custom field blank I don’t want it to execute my retail link code string.

So for my purposes:

if(get_post_custom_calues('ISBN')):
foreach(get_post_custom_values('ISBN') as $ISBN) {} ?>
<?php echo [Retail Link code]; ?>
<?php endif; ?>

I think my only concern is that the echo in my Retail link code contains other php calls, maybe I can try using the get post custom values there and see if that makes a difference. I’ll play and come back and let you know. Thanks!!

Yikes – I hope I don’t need to do that.

I’ve tested the $ISBN in a more mundane code:

<?php $ISBN=get_post_meta($post->ID, 'ISBN', $single = true);
if ($ISBN = null) {
echo "Nothing";
} else {echo "Something";
}
?>

That works, I don’t think it has anything to do with the $ISBN but instead something in the retail links code that isn’t friendly with the else {echo ” “;