PHP listening Socket

PHP listening Socket
                 
                                                                                                                                                                                                                                                                                                                  

if ($socket) {
$result = socket_bind($socket, 'localhost', 1337);
if ($result) {
 $result = socket_listen($socket, 5);
 if ($result) {
 echo "Listening successful";
 }
}
}else{
echo "Listening failed";
}
do {
if (($msgsock = socket_accept($socket))) { /* Send prompt information to the connected user*/
 $msg = "======== ==================================rn" .
 "Welcome to the PHP Test Server. rnrn" .
 "To quit, type 'quit'.rn" .
 "To shut down the server type 'shutdown'.rn" .
 "To get help message type 'help'.rn" .
 "======= =====================================rn" .
 "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;
 } /* Close the client when the client enters the quit command End connection*/
 if ($buf == 'q') {
 break;
 } /* When the client enters the shutdown command, both the server and the client are shut down*/
 if ($buf == 'shutdown') {
 socket_close($msgsock);
 break 2;
 } /* Output help information when the client enters the help command*/
 if ($buf == 'h') {
 $msg = "PHP Server Help Message rnrn".
 " To quit, type 'quit'. rn" .
 " To shut down the server type 'shutdown'.rn" .
 " To get help message type 'help'.rn" .
 "php> ";
 socket_write ($msgsock, $msg, strlen($msg));
 continue;
 } /* Prompt message when the client input command does not exist*/
 $talkback = "PHP: unknown command '$buf'.rnphp> ";
 socket_write($msgsock, $talkback, strlen($talkback));
 echo "$bufn";
} while (true);
socket_close($msgsock);
}while (true);
/* Close Socket connection */
socket_close($socket);


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