[Php-java-bridge-users] Need Help for Linux: Connecting Php and MySQL using Php-Java Bridge

One of the uses I currently have for Php-Java Bridge is to allow PHP to connect to mySQL. Doing this in Windows is simple, all I have to do is add the following in the php.ini file:

[PHP_MySQL]
extension=php_mysql.dll

And then copy-paste the php_mysql.dll from the dll's that come with the php installer into (apache-tomcat installation directory)/webapps/JavaBridge/Web.INF/cgi. 

What I want to know is if it is an equivalent way of doing this in Red Hat Linux. For instance, instead of say php_mysql.dll, is there a php_mysql.so file out there somewhere?

Thank you in advance for your assistance
-Kevin