Description:
------------
OK, firstly, without a context paramter specifying a bindto, stream_socket_client() fails to connect to IPv6 IP's with the following warning:
Warning: stream_socket_client(): unable to connect to tcp://[2001:470:1f09:11c:6d6b:7061:7373:7764]:6667 (Unknown error) in /usr/home/jobe/working/php/test.php on line 8

Secondly when you use a stream context as returned by stream_context_create() to specify an IPv6 IP or :: (the 0 of IPv6) address and port to bind a client connection, stream_socket_client() always responds with the following warning:
Warning: stream_socket_client(): failed to bind to '2001:470:1f09:11c:0:0:6a6f:6265:0', system said: Can't assign requested address in /usr/home/jobe/working/php/test.php on line 8

Now I can confirm the IPv6 address 2001:470:1f09:11c::6a6f:6265 IS available on a local interface as I have other applications using it. Also the connection IS established, but is NOT bound to the IPv6 IP specified.

Reproduce code:
---------------
For first issue:

$fp = stream_socket_client("tcp://[2001:470:1f09:11c:6d6b:7061:7373:7764]:6667", $errno, $errstr, 30);
if (!$fp) {
        die("$errstr ($errno)\n");
}

For second issue:
$opts = array('socket' => array('bindto' => '[2001:470:1f09:11c::6a6f:6265]:0'));
$ctx = stream_context_create($opts);

$fp = stream_socket_client("tcp://[2001:470:1f09:11c:6d6b:7061:7373:7764]:6667", $errno, $errstr, 30, STREAM_CLIENT_CONNECT, $ctx);
if (!$fp) {
        die("$errstr ($errno)\n");
}


Expected result:
----------------
For the first issue I expect stream_socket_client() to successfully connect to the IPv6 IP specified binding to [::]:0 in the same way it binds to 0:0 for IPv4

For the second issue I expect stream_socket_client() to successfully connect to the IPv6 IP specified binding to the context's IPv6 IP specification.

Actual result:
--------------
For the first issue no connection is established and a warning is issued.

For the second issue a warning is issued, the connection is established, but is not bound to the IPv6 IP specified.