SOCKET-CONTEXT-OPTIONS(3) 1 SOCKET-CONTEXT-OPTIONS(3)Socket context options - Socket context option listing
Socket context options are available for all wrappers that work over sockets, like tcp, http and ftp.
o $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 for IPv4 addresses, and [ip]:port for IPv6 addresses. 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.
o $backlog
- Used to limit the number of outstanding connections in the socket's listen queue.
Note
This is only applicable to stream_socket_server(3).
+--------+-----------------+
|Version | |
| | |
| | Description |
| | |
+--------+-----------------+
| 5.3.3 | |
| | |
| | Added backlog. |
| | |
| 5.1.0 | |
| | |
| | Added bindto. |
| | |
+--------+-----------------+
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);
?>
PHP Documentation Group SOCKET-CONTEXT-OPTIONS(3)
Check Out this Related Man Page
SOCKET_CREATE_LISTEN(3) 1 SOCKET_CREATE_LISTEN(3)socket_create_listen - Opens a socket on port to accept connectionsSYNOPSIS
resource socket_create_listen (int $port, [int $backlog = 128])
DESCRIPTION socket_create_listen(3) creates a new socket resource of type AF_INET listening on all local interfaces on the given port waiting for new
connections.
This function is meant to ease the task of creating a new socket which only listens to accept new connections.
PARAMETERS
o $port
- The port on which to listen on all interfaces.
o $backlog
- The $backlog parameter defines the maximum length the queue of pending connections may grow to. SOMAXCONN may be passed as
$backlog parameter, see socket_listen(3) for more information.
RETURN VALUES socket_create_listen(3) returns a new socket resource on success or FALSE on error. The error code can be retrieved with
socket_last_error(3). This code may be passed to socket_strerror(3) to get a textual explanation of the error.
NOTES
Note
If you want to create a socket which only listens on a certain interface you need to use socket_create(3), socket_bind(3) and
socket_listen(3).
SEE ALSO socket_create(3), socket_create_pair(3), socket_bind(3), socket_listen(3), socket_last_error(3), socket_strerror(3).
PHP Documentation Group SOCKET_CREATE_LISTEN(3)
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