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socket_shutdown

(PHP 4 >= 4.1.0, PHP 5)

socket_shutdownShuts 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 how can be one of the following:

possible values for how
0 Shutdown socket reading
1 Shutdown socket writing
2 Shutdown socket reading and writing

Return Values

Returns TRUE on success or FALSE on failure.

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User Contributed Notes 3 notes

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2
recycling dot sp dot am at gmail dot com
4 years ago
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.
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1
ludvig dot ericson at gmail dot com
9 years ago
Sockets should be first shutdown and then closed.
<?php
// Sample: Closing sockets gracefully
socket_shutdown($sock, 2);
socket_close($sock);
?>
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0
richard dot thomas at psysolutions dot com
8 years ago
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.
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