Description:
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Currently, there is now way to determine if the pfsockopen() created a new connection or used an existing connection.


Expected result:
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This information is very important for some protocols (specifically, the EPP protocol, RFC 3730, and its TCP transport specification in RFC 3734), which uses a stateful session management system.

I'd suggest something like this:

<?php

$sock = pfsockopen($host, $port, $etc);

$data = stream_get_meta_data($sock);

print $data[persistent];

?>

the value of $data[persistent] might be one of "new" or "existing", depending on whether the previous pfsockopen() had to create a new connection, or was able to reuse an existing one.

This would be very useful for protocols like EPP (see RFC 3734) and IMAP, which are stateful, and for which negotiation and authentication are done once, upon connection.