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 — Cierra un socket para dejar de recibir, enviar, o ambos
Descripción
bool socket_shutdown
( resource
$socket
[, int $how = 2
] )
La función socket_shutdown() permite detener
la entrada y salida de toda la información (lo predeterminado) que está siendo enviada a través del
socket
Parámetros
-
socket -
Un recurso socket válido creado con socket_create().
-
how -
El valor de
howpuede ser uno de los siguientes:Valores posibles de how0 Cerra el socket para dejar de leer 1 Cerra el socket para dejar de escribir 2 Cerra el socket para dejar de leer y escribir
Valores devueltos
Devuelve TRUE en caso de éxito o FALSE en caso de error.
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User Contributed Notes 3 notes
recycling dot sp dot am at gmail dot com ¶
3 years ago
ludvig dot ericson at gmail dot com ¶
8 years ago
Sockets should be first shutdown and then closed.
<?php
// Sample: Closing sockets gracefully
socket_shutdown($sock, 2);
socket_close($sock);
?>
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.
