pfsockopen
(PHP 3 >= 3.0.7, PHP 4, PHP 5)
pfsockopen -- Open persistent Internet or Unix domain socket connectionDescription
resource pfsockopen ( string hostname [, int port [, int &errno [, string &errstr [, float 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().