Openning Dbases

I have been trying to load a dbase using this line of code

$db = dbase_open("c:\wwwroot\tas\unitinfo.dbf",3);

However i allways get this error

Fatal error: Call to undefined function: dbase_open() in c:\wwwroot\tas\units.php on line 12

where am i going wrong?
Is there anyway to link to access with out using dsn in php like there is in asp?

Thanks

undefined function error means you need to recompile php or add a module with dbase support to php.

Do You know where i can get a dbase module from?

DO you need to configure php in a differnt way for XITAMI?