Description:
------------
When you pass a keyed array of sockets into socket_select the keys are lost.

Reproduce code:
---------------
$clients = array();
$listener = socket_create_listen(9999);
$clients[uniqid()] = socket_accept($listener);

$read = $clients;
print_r($read);
socket_select($read, $w = NULL, $e = NULL, NULL);
print_r($read);
socket_shutdown($listener);
socket_close($listener);

Expected result:
----------------
to test: 
telnet localhost 9999
enter text, hit enter.


I expect the second print_r($read) to have the same key as the first print_r($read).

Actual result:
--------------
Array
(
     [47bcc1d71874d] => Resource id #5
)
Array 
(
     [0] => Resource id #5
)