str_replace() problem

I am performing a str_replace() on a large string, and everything works fine, except that two of the elements I'm searching for (and replacing) have the same first letters. To keep it the issue clear, here's a simple example of what I'm talking about: Blue Blueberry Now, if I use: str_replace("Blue","Red",$paragraph); str_replace("Blueberry","Strawberry",$paragraph); ...all occurrences of Blue—including Blueberry—will be replaced with Red. The result will be something like: Red Redberry ...But what I want is... Red Strawberry I need str_replace to somehow only search for a complete occurrence of each item. How do I do that? I've read the docs, and I just can't see any examples. Thanks. ...Rene --- René Fournier, rene@smartslitters.com Toll-free +1.888.886.2754 Tel +1.403.291.3601 Fax +1.403.250.5228 www.smartslitters.com SmartSlitters International #33, 1339 - 40th Ave NE Calgary AB T2E 8N6 Canada