Proper Code for Image the Zen Cart Way

[DLLong]

I need to add a spacer.gif to my product description. I can easily add it using HTML with something like:
<p> blah, blah, blah
<img src="includes/templates/CUSTOM/images/spacer.gif" width="10" height="100" />
</p>

But I am trying to learn how to use PHP and Zen Cart correctly. I tried the following code in the product description and it doesn't work correctly.
<p> blah, blah, blah
<?php
zen_image(DIR_WS_TEMPLATE.'images/spacer.gif','','100px','10px')
?>
</p>

Would some kind soul correct/give me a sample of what I should use?

[jeking]

You can't, to the best of my knowledge, use any code in the product description other than HTML.

[schoolboy]

Jim is correct.

The description data is stored in the database - not as php in a file. So it should just be plain old HTML. When ZC compiles the whole page for the browser, it simply parses the product description into the page.

So, in these cases, it's fine to use HTML protocol.