Socket context options

Socket context options

Socket context options — Socket context option listing

说明

Socket context options are available for all wrappers that work oversockets, like tcp, http and ftp. 

可选项

bindto 

Used to specify the IP address (either IPv4 or IPv6) and/or theport number that PHP will use to access the network. The syntaxis ip:port for IPv4 addresses, and [ip]:port for IPv6 addresses.Setting the IP or the port to 0 will let the systemchoose 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 thesocket'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 the '2001:db8::1' IPv6 address

// and port '7000'

$opts = array(

    'socket' => array(

        'bindto' => '[2001:db8::1]: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);

?>