RE: PHP Sockets - How to detect client disconnection?

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I used Process Control Functions in PHP and installed some signals to catch
socket disconnection.
My attempt to do this in loops were a harder way or i could not manage it.
There must be some notes about this in archives or i can send some of my
code so that you can have a look at them.


Aras Koktas
manager@xxxxxxxxxx
Business Excellence Development
Phi.dot Internet Systems


-----Original Message-----
From: Anthony Rasmussen [mailto:evoluenta@xxxxxxxxxxx]
Sent: Saturday, January 06, 2007 11:12 PM
To: php-general@xxxxxxxxxxxxx
Subject:  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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