Without knowing what the shared library is that you're trying to use,
there's not much I can say. It may be that PECL already has the extension you're looking for. If it's a library you created and you want to use it as a PHP extension, take a look at the PHP manual, particularly the section on creating extensions:
http://www.php.net/manual/en/zend.creating.php
-- Ben Ramsey
http://benramsey.com/
The shared library is from a local software developer it is an interface with biometric sensors. It is a closed .so i can´t change it. Perhaps i sould make my question clear.
Do i have to write an extension wraper to a generic .so or can o dl it and use it funcions from php?
Tks
Angelo