stream_socket_pair
(PHP 5 >= 5.1.0, PHP 7, PHP 8)
stream_socket_pair — Creates a pair of connected, indistinguishable socket streams
Beschreibung
$domain
, int $type
, int $protocol
): array|falsestream_socket_pair() creates a pair of connected, indistinguishable socket streams. This function is commonly used in IPC (Inter-Process Communication).
Parameter-Liste
-
domain
-
The protocol family to be used:
STREAM_PF_INET
,STREAM_PF_INET6
orSTREAM_PF_UNIX
-
type
-
The type of communication to be used:
STREAM_SOCK_DGRAM
,STREAM_SOCK_RAW
,STREAM_SOCK_RDM
,STREAM_SOCK_SEQPACKET
orSTREAM_SOCK_STREAM
-
protocol
-
The protocol to be used:
STREAM_IPPROTO_ICMP
,STREAM_IPPROTO_IP
,STREAM_IPPROTO_RAW
,STREAM_IPPROTO_TCP
orSTREAM_IPPROTO_UDP
Hinweis: Please consult the Streams constant list for further details on each constant.
Rückgabewerte
Returns an array with the two socket resources on success, or
false
on failure.
Beispiele
Beispiel #1 A stream_socket_pair() example
This example shows the basic usage of stream_socket_pair() in Inter-Process Communication.
<?php
$sockets = stream_socket_pair(STREAM_PF_UNIX, STREAM_SOCK_STREAM, STREAM_IPPROTO_IP);
$pid = pcntl_fork();
if ($pid == -1) {
die('could not fork');
} else if ($pid) {
/* parent */
fclose($sockets[0]);
fwrite($sockets[1], "child PID: $pid\n");
echo fgets($sockets[1]);
fclose($sockets[1]);
} else {
/* child */
fclose($sockets[1]);
fwrite($sockets[0], "message from child\n");
echo fgets($sockets[0]);
fclose($sockets[0]);
}
?>
Das oben gezeigte Beispiel erzeugt eine ähnliche Ausgabe wie:
child PID: 1378 message from child