php5 mysql extension

Hello, I've just installed: apache2 mysql5 +server php5 +mysql5 +apache2 +pear However, I can't seem to locate the mysql.so extension anywhere in my system. If I am correct, I need to specify this in my php.ini file so that it can talk to my database. Am I missing something here? -- Branden Timm University of Wisconsin Division of Information Technology branden.timm@doit.wisc.edu (608) 890-1270 --