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.
See Also
- socket_connect() - Initiates a connection on a socket
- socket_listen() - Listens for a connection on a socket
- socket_create() - Create a socket (endpoint for communication)
- socket_last_error() - Returns the last error on the socket
- socket_strerror() - Return a string describing a socket error
← socket_accept
socket_clear_error →
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