php man page for pfsockopen

PFSOCKOPEN(3)								 1							     PFSOCKOPEN(3)

pfsockopen - Open persistent Internet or Unix domain socket connection

SYNOPSIS
       resource   pfsockopen   (string	  $hostname,   [int    $port   =   -1],   [int	  &$errno],   [string	 &$errstr],   [float   $timeout  =
       ini_get("default_socket_timeout")])

DESCRIPTION
	This function behaves exactly as fsockopen(3) with the difference that the connection is not closed after the script finishes. It  is  the
       persistent version of fsockopen(3).

PARAMETERS
	For parameter information, see the fsockopen(3) documentation.

SEE ALSO
       fsockopen(3).

PHP Documentation Group 													     PFSOCKOPEN(3)