PHP上下文(Context)选项和参数:套接字上下文选项
2019-09-07 阅读 : 次
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, http 和 ftp.
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 stream_socket_server().
更新日志
版本 | 说明 |
---|---|
5.1.0 | Added bindto. |
5.3.3 | Added backlog. |
范例
Example #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);
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