socket_bind

(PHP 4 >= 4.1.0, PHP 5, PHP 7)

socket_bind — Binds a name to a socket

Description

bool socket_bind ( resource $socket , string $address [, int $port = 0 ] )

Binds the name given in address to the socket described by socket. This has to be done before a connection is be established using socket_connect() or socket_listen().

Parameters

socket

A valid socket resource created with socket_create().

address

If the socket is of the AF_INET family, the address is an IP in dotted-quad notation (e.g. 127.0.0.1).

If the socket is of the AF_UNIX family, the address is the path of a Unix-domain socket (e.g. /tmp/my.sock).

port (Optional)

The port parameter is only used when binding an AF_INET socket, and designates the port on which to listen for connections.

Return Values

Returns TRUE on success or FALSE on failure.

The error code can be retrieved with socket_last_error(). This code may be passed to socket_strerror() to get a textual explanation of the error.

Examples

Example #1 Using socket_bind() to set the source address

<?php
//?Create?a?new?socket
$sock?=?socket_create(AF_INET,?SOCK_STREAM,?SOL_TCP);

//?An?example?list?of?IP?addresses?owned?by?the?computer
$sourceips['kevin']????=?'127.0.0.1';
$sourceips['madcoder']?=?'127.0.0.2';

//?Bind?the?source?address
socket_bind($sock,?$sourceips['madcoder']);

//?Connect?to?destination?address
socket_connect($sock,?'127.0.0.1',?80);

//?Write
$request?=?'GET?/?HTTP/1.1'?.?"\r\n"?.
???????????'Host:?example.com'?.?"\r\n\r\n";
socket_write($sock,?$request);

//?Close
socket_close($sock);

?>

Notes

Note: This function must be used on the socket before socket_connect().

Note: Windows 9x/ME compatibility note: socket_last_error() may return an invalid error code if trying to bind the socket to a wrong address that does not belong to your machine.

Description

Parameters

Return Values

Examples

Notes

See Also