Socket context options
Socket context options — Socket context option listing
Description
Socket context options are available for all wrappers that work over
sockets, like tcp, http and
ftp.
Options
-
bindto
-
Used to specify the IP address (either IPv4 or IPv6) and/or the
port number that PHP will use to access the network. The syntax
is 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.
Examples
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);
?>
