套接字上下文选项

套接字上下文选项列表

说明

套接字上下文选项可用于所有工作在套接字上的封装协议,像 tcp, httpftp.

可选项

bindto
用户PHP访问网络的指定的IP地址(IPv4或IPv6其中的一个)和/或 端口号,这个语法是 ip:port. Setting the IP or the port to 0 will let the system choose the IP and/or port.

Note:

As FTP creates two socket connections during normal operation, the port number cannot be specified using this option.

backlog
Used to limit the number of outstanding connections in the socket's listen queue.

Note:

This is only applicable to class="function">stream_socket_server.

更新日志

版本说明
5.1.0Added bindto.
5.3.3Added backlog.

范例

示例 #1 Basic bindto usage example

<?php
// connect to the internet using the '192.168.0.100' IP
$opts = array(
    'socket' => array(
        'bindto' => '192.168.0.100:0',
    ),
);


// connect to the internet using the '192.168.0.100' IP and port '7000'
$opts = array(
    'socket' => array(
        'bindto' => '192.168.0.100:7000',
    ),
);


// connect to the internet using port '7000'
$opts = array(
    'socket' => array(
        'bindto' => '0:7000',
    ),
);


// create the context...
$context = stream_context_create($opts);

// ...and use it to fetch the data
echo file_get_contents('http://www.example.com', false, $context);

?>