(PECL zmq >= 0.5.0)
ZMQSocket::__construct — Construct a new ZMQSocket
$context
, int $type
[, string $persistent_id = NULL
[, callback $on_new_socket = NULL
]] )
Constructs a ZMQSocket object. persistent_id parameter can be used to allocated a persistent
socket. A persistent socket has to be allocated from a persistent context and it stays connected over multiple requests.
The persistent_id parameter can be used to recall the same socket over multiple requests. The
on_new_socket is called only when a new underlying socket structure is created.
contextZMQContext object.
type
The socket type. See ZMQ::SOCKET_* constants.
persistent_id
If persistent_id is specified the socket will be persisted over multiple requests.
If context is not persistent the socket falls back to non-persistent mode.
on_new_socketCallback function, which is executed when a new socket structure is created. This function does not get invoked if the underlying persistent connection is re-used.
Example #1 A ZMQSocket() example
Using callback the bind/connect socket
<?php
/*
The socket is persistent so this function is called only on the
first request to the script.
*/
function on_new_socket_cb(ZMQSocket $socket, $persistent_id = null)
{
if ($persistent_id === 'server') {
$socket->bind("tcp://localhost:12122");
} else {
$socket->connect("tcp://localhost:12122");
}
}
/* Allocate a new context */
$context = new ZMQContext();
/* Create a new socket */
$socket = $context->getSocket(ZMQ::SOCKET_REP, 'server', 'on_new_socket_cb');
$message = $socket->recv();
echo "Received message: {$message}\n";
?>
The callback signature
Note:
function on_new_socket_cb(ZMQSocket $socket, string $persistent_id = null);
Throws ZMQSocketException on error.