how to accept multiple connection to the device - php

Question

I am creating a socket script that will listen to our 3 devices.and the device is setup in one server ip and one port only.
$file = fopen('txt.log','a+');
$server = stream_socket_server('tcp://'.$ipserver.':'.$port, $errno, $errorMessage);
if(!$server) {
echo "$errorMessage ($errno)<br />\n";
}
else{
while($client = #stream_socket_accept($server,$timeout)) {
stream_copy_to_stream($client, $file);
fclose($file);
fclose($client);
}
}
but the problem is that if one device is connected,the two devices cannot connect anymore.I appreciate some one can help me how to get this work.or give me some idea
Thank you in advance.

Answer 1

$file = fopen('txt.log', 'a+');
$server = stream_socket_server("tcp://$ipserver:$port", $errno, $errorMessage);
if (!$server)
echo "$errorMessage ($errno)<br />\n";
else
{
$s = array($server);
$t = $timeout == -1 ? NULL : $timeout;
while ($r = $s and stream_select($r, $n=NULL, $n=NULL, $t))
foreach ($r as $stream)
if ($stream == $server) // new client
$s[] = stream_socket_accept($server, -1);
else
if (!fputs($file, fgets($stream)))
{
fclose($stream);
array_splice($s, array_search($stream, $s), 1);
}
}