[!--quoteo(post=383229:date=Jun 13 2006, 10:30 PM:name=SemiApocalyptic)--][div class=\'quotetop\']QUOTE(SemiApocalyptic @ Jun 13 2006, 10:30 PM)
Maybe you could try dumping the output into a variable to see if any errors were returned?
system("unzip -o xml.zip",$output)
You'd need to use -p to pipe to stdout, if you use exec instead $output will be an array, you can implode it with "\n" to make it a string again, but if it's php source it wont render to the browser screen, something php does for safety. This way you will have closer control of the archive by bringing it into your process. If you don't want to do this then make sure that the archive is being addressed correctly and then know where the unzipped file is being written to, maybe you just lost it