PHP Listening socket

<?php
Set_time_limit (10);
$commonProtocol = Getprotobyname ("TCP");
$socket = Socket_create (Af_inet, Sock_stream, $commonProtocol);
if ($socket) {
$result = Socket_bind ($socket, ' localhost ', 1337);
if ($result) {
$result = Socket_listen ($socket, 5);
if ($result) {
echo "Monitoring success";
}
}
}else{
echo "Monitoring Failure";
}
do {
if ($msgsock = socket_accept ($socket)) {/* Send the prompt message to the user on the connection/*
$msg = "==========================================\r\n".
"Welcome to the PHP Test Server." \r\n\r\n ".
"To quit, type ' quit '." \ r \ n ".
"To shut down the server type ' shutdown '. \ r \ n".
"To get help message type ' help '. \ r \ n".
"==========================================\r\n".
"Php>";
}
Socket_write ($msgsock, $msg, strlen ($msg));
do {
$buf = Socket_read ($msgsock, 2048, php_binary_read);
if (false = = $buf) {
echo "Socket_read () Failed:reason:". Socket_strerror ($result). "\ n";
Break 2;
}
if (! $buf = Trim ($buf)) {
Continue
/* Client input QUIT command to shut down the client connection * *
if ($buf = = ' Q ') {
Break
/* Client input Shutdown command when both the server and the client are closed * *
if ($buf = = ' shutdown ') {
Socket_close ($msgsock);
Break 2;
}/* Client input Help command when output assistance information * *
if ($buf = = ' h ') {
$msg = "PHP Server help message \r\n\r\n".
"To quit, type ' quit '." \ r \ n ".
"To shut down the server type ' shutdown '. \ r \ n".
"To get help message type ' help '. \ r \ n".
"Php>";
Socket_write ($msgsock, $msg, strlen ($msg));
Continue
}/* Prompt message if client input command does not exist *
$talkback = "php:unknow command" $buf ' .\r\nphp> ';
Socket_write ($msgsock, $talkback, strlen ($talkback));
echo "$BUF \ n";
} while (true);
Socket_close ($msgsock);
}while (TRUE);
/* Close SOCKET Connection * *
Socket_close ($socket);
?>