Re: sockets and network interfaces

I suppose it would have helped if I had looked at the socket functions
in greater depth before posting. I had already changed the default
source IP for the server (using "ip route chg...") when I discovered
this:

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);

?>

http://us2.php.net/manual/en/function.socket-bind.php

Of course, socket_bind cannot be used in conjunction with fsockopen,
but the other socket functions can, which is exactly what I needed.

.