Socket 函数
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socket_shutdown

(PHP 4 >= 4.1.0, PHP 5)

socket_shutdown — Shuts down a socket for receiving, sending, or both

说明

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

参数

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

返回值

成功时返回 TRUE， 或者在失败时返回 FALSE.

Socket 函数
在线手册：中文 英文
PHP手册
PHP手册 - N: Shuts down a socket for receiving, sending, or both

用户评论:

recycling dot sp dot am at gmail dot com (16-Sep-2010 05:09)

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.

korvin at biz dot by (21-May-2009 10:12)

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 06:20)

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 09:13)

Sockets should be first shutdown and then closed.
<?php
// Sample: Closing sockets gracefully
socket_shutdown($sock, 2);
socket_close($sock);
?>