PHP Sockets - How to detect client disconnection?

How do I detect a disconnected client from a socket resource?

In an infinite loop, I socket_read() every open resource that passes a socket_select().

As far as I know, the only way to detect if the client disconnected unexpectedly from their socket resource is when socket_read() returns FALSE (which, during my testing, produced the warning: "An established connection was aborted by the software in your host machine.").

However, socket_read() doesn't return FALSE on a disconnected client's socket resource until I first attempt to socket_write() to that resource.

In brief pseudo code...

socket_create(AF_INET, SOCK_STREAM, SOL_TCP)
while (TRUE)
foreach (resource where (false === socket_select($arrayofresources,NULL, NULL, 0, 0))
if (socket_read() === false)
WON'T DETECT DISCONNECT UNTIL I FIRST socket_write()

I appreciate any support you offer and thank you for your time.

Best regards,

-Tony

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