Setting the socket timeout microseconds ('usec') does not work under Windows, at least under PHP/5.2.9:
<?php
$timeout = array('sec'=>1,'usec'=>500000);
socket_set_option($socket,SOL_SOCKET,SO_RCVTIMEO,$timeout);
var_dump(socket_set_option($socket,SOL_SOCKET,SO_RCVTIMEO));
?>
Output on Windows box:
array(2) {
["sec"]=>
int(1)
["usec"]=>
int(0)
}
Output on Linux box:
array(2) {
["sec"]=>
int(1)
["usec"]=>
int(500000)
}
socket_set_option
(PHP 4 >= 4.3.0, PHP 5)
socket_set_option — Setzt die Optionen für einen Socket
Beschreibung
Mit socket_set_option() wird die Option, die mit
optname angegeben wurde, auf der Protokollebene
level für den Socket socket
auf den Wert gesetzt, der in optval übergeben wurde.
Parameter-Liste
-
socket -
Ein gültiger Socket-Deskriptor, der von socket_create() oder socket_accept() erzeugt wurde.
-
level -
Der Parameter
levelgibt die Protokollebene an, auf der diese Option gilt. Um beispielsweise Optionen auf dem Socket-Level abzufragen würde man den Parameterlevelauf den WertSOL_SOCKETsetzen. Andere Ebenen, wie etwa TCP können benutzt werden, indem man die Protokollnummer dieser Ebene benutzt. Protokollnummern erhält man mit der Funktion getprotobyname(). -
optname -
Es sind dieselben Socket-Optionen verfügbar, wie bei der Funktion socket_get_option() beschrieben.
-
optval -
Der Wert der Option.
Rückgabewerte
Gibt bei Erfolg TRUE zurück. Im Fehlerfall wird FALSE zurückgegeben.
Beispiele
Beispiel #1 socket_set_option() Beispiel
<?php
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
if (!is_resource($socket)) {
echo 'Kann keinen Socket erzeugen: '. socket_strerror(socket_last_error()) . PHP_EOL;
}
if (!socket_set_option($socket, SOL_SOCKET, SO_REUSEADDR, 1)) {
echo 'Kann keine Option setzen für Socket: '. socket_strerror(socket_last_error()) . PHP_EOL;
}
if (!socket_bind($socket, '127.0.0.1', 1223)) {
echo 'Kann den Socket nicht benennen: '. socket_strerror(socket_last_error()) . PHP_EOL;
}
$rval = socket_get_option($socket, SOL_SOCKET, SO_REUSEADDR);
if ($rval === false) {
echo 'Kann keine Socket-Optionen ermitteln: '. socket_strerror(socket_last_error()) . PHP_EOL;
} else if ($rval !== 0) {
echo 'SO_REUSEADDR ist für den Socket gesetzt!' . PHP_EOL;
}
?>
Changelog
| Version | Beschreibung |
|---|---|
| 4.3.0 | Diese Funktion wurde umbenannt. Ihr bisheriger Name war socket_setopt(). |
add a note
User Contributed Notes 6 notes
DaveRandom ¶
3 years ago
ckozler at kozler dot net ¶
2 years ago
It appears that Winsock does not acknowledge timeout (send and receive) on Windows.
aeolianmeson at ifacfchi dot blitzeclipse dot com ¶
5 years ago
Lingering will sometimes not work when you're working with non-blocking sockets. Even if the socket is set to linger and you keep tying to close until the socket doesn't return an error and the resource is no longer identifiable as type 'Socket', the socket may STILL close without sending everything.
Therefore, in the event that you are using non-blocking sockets (which is preferable if you care at all about signaling), you should set the socket as blocking (socket_set_block()) before calling to close it. This will allow everything to flush before it returns.
Dustin Oprea
ludvig dot ericson at gmail dot com ¶
7 years ago
I would like to comment on the previous note regarding blocking sockets.
There is more to blocking sockets than waiting for data to be received when trying to be read upon, just to make example, a listening blocking socket will wait for a client to try to connect before it returns when you socket_accept() it.
drenintell ¶
8 years ago
To expand a bit more on what "tim at e2-media dot co dot nz" started.
SO_SNDTIMEO is one of the many constants you can use with socket_set_option.
See http://ca.php.net/manual/en/ref.sockets.php for the available Predefind Constants and visit http://man.he.net/man2/setsockopt for the meaning of the ones relevant.
Tim's example might seem at first a bit non-intuitive since he is using the SO_SNDTIMEO constant. Which means, if the socket has to send out data, it must do it within the limit specified - in his case 10 seconds. Usually you won't set a timeout for sending out data. Nevertheless, the example is valid, and there are situations where you need to do so.
A more intuitive use of socket_set_option would be to set a time out for a blocking socket (a socket that waits for data to be receive when read from). You would do this like so:
socket_set_option($socket,SOL_SOCKET, SO_RCVTIMEO, array("sec"=>0, "usec"=>100));
Notice that sec= 0 and usec= 100; Depending on how long you want your program to wait to recieve data, you might want to change these values.
Regards,
drenintell
tim at e2-media dot co dot nz ¶
9 years ago
To set a socket timeout value (assuming you've set it blocking) use:
socket_set_option(
$socket,
SOL_SOCKET, // socket level
SO_SNDTIMEO, // timeout option
array(
"sec"=>10, // Timeout in seconds
"usec"=>0 // I assume timeout in microseconds
)
);
