eregi_replace and comment tags

[Anon]

I've been having difficulty figuring out how to replace the following:

<!--place figure $i here-->

with

<img src="../test/$figure">

Also do you know of a good resource for learning regex?

Thank you,
Elizabeth

[znouza]

eregi_replace("<!--place figure ([^>]*) here-->","<img src=\"\1\">",$text);