I'm test this script in windows xp (PHP Version 4.3.0)....... but 
 
this script works in windows xp (ph 4.3.0) with 2 or more users connected...... 
however, when i try to use this same script on my linux box (mandrake 8.2 php.4.3.1)... and i can't send 2 or more messages without send a some message in another connection.

(Sorry for my bad English!  its powered by http://babelfish.altavista.com/ ) 

:)


<?php
 
ob_implicit_flush ();
error_reporting (E_ALL);
 
$address = '192.168.0.249';
$port = 1433;
 
if (($sock = socket_create (AF_INET, SOCK_STREAM, 0)) < 0) {
    echo "socket_create() failed: reason: " . socket_strerror (socket_last_error()) . "\n";
    exit;
}
 
if( !(socket_set_nonblock( $sock ) ) ) {
 echo "socket_set_nonblock()" . socket_strerror(socket_last_error()) . "\n";
    exit;
} 
 
if (($ret = socket_bind ($sock, $address, $port)) < 0) {
    echo "socket_bind() failed: reason: " . socket_strerror (socket_last_error()) . "\n";
    exit;
}
 
if (($ret = socket_listen ($sock, 5)) < 0) {
    echo "socket_listen() failed: reason: " . socket_strerror (socket_last_error()) . "\n";
    exit;
}
 
 
 
$vtSock = Array();
global $vtSock;
 
$volta = 0;
do {
    
 $msgsock = @socket_accept($sock);
 
 if (is_resource($msgsock)) {
  
  $vtSock[] = $msgsock;
    
     /* Send instructions. */
     $msg = "\nWelcome! \n\r.\n\r";
     socket_write($msgsock, $msg, strlen($msg));
 }
 
 for ($x=0;$x<count($vtSock);$x++) {
  $oSock = $vtSock[$x];
  
        if ($oSock != false) {
         
         $buf = @socket_read( $oSock, 2048 );
          if (strlen($buf) > 0) {
           $talkback = "TELNET [$x] send: '$buf'.\n\r";
           socket_write ($oSock, $talkback, strlen ($talkback));
 
           echo "Hey server, TELNET [$x] send: $buf<br>\n";
          
           if ($buf == 'quit') {
            $vtSock[$x] = false;
            socket_close ($oSock);
           }
          }
          $volta++;
   }
  
 }
     
} while (true);
 
for ($x=0;$x<$cdSock;$x++) {
 $oSock = $vtSock[$x];
  
    if ($oSock != false)
  socket_close ($oSock);
  
}
 
?>