(PHP 3>= 3.0.7, PHP 4 , PHP 5)

pfsockopen --  Open persistent Internet or Unix domain socket connection


resource pfsockopen ( string hostname, int port [, int &errno [, string &errstr [, int timeout]]] )

This function behaves exactly as fsockopen() with the difference that the connection is not closed after the script finishes. It is the persistent version of fsockopen().