[PHP-DB] Is Sybase supported on Windows?

[Javier Boluda]

Hello,
    I'm trying to connect via PHP to Sybase from Win'98 Having Personal Web Server and 
I get the following error:
Fatal error: Call to unsupported or undefined function sybase_connect() 

I haven't found any dll named *sybase* for Windows. Is there any way of supporting 
Sybase?
  Please help me.
    Many thanks,
        Javier