Construct a new ZMQSocket

# ZMQSocket::__construct

(PECL zmq >= 0.5.0)

ZMQSocket::__construct — Construct a new ZMQSocket

### 説明

public function ZMQSocket::__construct(
ZMQContext `$context`,
int `$type`,
string `$persistent_id` = `null`,
callable `$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.

### パラメータ

`context`

  ZMQContext 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_socket`

  Callback 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.

  function callback(ZMQSocket `$socket`, string `$persistent_id` = `null`)

### エラー / 例外

Throws ZMQSocketException on error.

### 例

例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";
    ?>

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