Preventing PHP code from excecuting

Hullo,
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It’s sort of hard to describe what I’m looking for, although I’m sure it’s a common practice.
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I’ve got a tag, <?php include(‘wp-comments.php’); ?>, that I don’t want compiled. In other words, if I have a file, index.php, that I view in a web browser, when I check the source of the page through the browser, I want <?php include(‘wp-comments.php’); ?> to still be there.
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Does that make sense?
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I have java script that I use to generate a pop up window with code on it that is hardcoded on the page that generated the pop up. I want to have this tag, <?php include(‘wp-comments.php’); ?>, appear in the pop up window.
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Does that make sense? It doesn’t to me when I read it over.
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For example, with java, you would put a back slash infront of things like ticks ( ‘ ) and such so that they are not compiled the first time around. How do I do that with PHP.
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Thanks.