Could you please bring example of the script that doesn't
work for you?

my script in php is simple. Its a conection with a relative direction with a socket AF_UNIX like this:
-----------
$enlacePuente="../pge/fichero";
 $fp = fsockopen($enlacePuente, 0, &$errno, &$errstr, 30);
 if(!$fp) 
  {
   genera_error("No activado puente a PGE: $errstr ($errno)en $enlacePuente");
  }
-----------
I had try use absolute directions too (like "/etc/httpd/htdocs/myweb/pge/fichero" and others)and it doesn't work.
The program server that creates the point 'fichero' it?s had been programmed in C (its basically a server in AF_UNIX mode). This program don?t have errors and works fine in Linux with other client?s, in fact all, php included, works fine in a Digital Alfa 4.0E (in all manners that I had probe in Linux 2.2.16)
Concretely the error that reports php its '(111) conection refused'. The same error that it?ll report if php didn't find the point of the AF_UNIX socket.

Works for me with latest version on Linux. Probably your
path is wrong or permissions insufficient to connect to the
socket.