socket_set_option
Shutdown and SOL_TCP:
<?php
$a= socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
socket_shutdown($a, 2)
?>
PHP Warning: socket_shutdown(): unable to shutdown socket [107]: Transport endpoint is not connected
Shutdown and SOL_UDP:
<?php
$a= socket_create(AF_INET, SOCK_STREAM, SOL_UDP);
socket_shutdown($a, 2)
?>
PHP Warning: socket_shutdown(): unable to shutdown socket [107]: Transport endpoint is not connected
Conclusion: if you are not actually connected, shutdown will fails with socket_error = 107, Transport endpoint is not connected. This is true for both TPC and UDP connection (which is suprising, UDP being a connectionless protocol). This is true no matter the value set for the how parameter.
socket_shutdown
(PHP 4 >= 4.1.0, PHP 5)
socket_shutdown — Shuts down a socket for receiving, sending, or both
Description
bool socket_shutdown
( resource
$socket
[, int $how = 2
] )
The socket_shutdown() function allows you to stop
incoming, outgoing or all data (the default) from being sent through the
socket
Parameters
-
socket -
A valid socket resource created with socket_create().
-
how -
The value of
howcan be one of the following:possible values for how0 Shutdown socket reading 1 Shutdown socket writing 2 Shutdown socket reading and writing
Return Values
Returns TRUE on success or FALSE on failure.
add a note
User Contributed Notes
socket_shutdown
recycling dot sp dot am at gmail dot com
16-Sep-2010 03:09
korvin at biz dot by
20-May-2009 08:12
Closing socket graceful
<?php
socket_shutdown($resHandle, 1);//remote host yet can read
usleep(500);//wait remote host
socket_shutdown($resHandle, 0);//close reading
socket_close($resHandle);//finaly we can free resource
?>
richard dot thomas at psysolutions dot com
23-Nov-2005 03:20
That is not a good example of a graceful shutdown. One should close the sending side of the socket and continue to read until the remote end closes its sending connection.
ludvig dot ericson at gmail dot com
02-Sep-2005 07:13
Sockets should be first shutdown and then closed.
<?php
// Sample: Closing sockets gracefully
socket_shutdown($sock, 2);
socket_close($sock);
?>