PHP监听Socket

<?phpset_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 ($result) {    echo "监听成功";   }}}else{echo "监听失败";}do {if (($msgsock = socket_accept($socket))) { /* 发送提示信息给连接上来的用户 */   $msg = "==========================================\r\n" .   "Welcome to the PHP Test Server. \r\n\r\n" .   "To quit, type 'quit'. \r\n" .   "To shut down the server type 'shutdown'.\r\n" .   "To get help message type 'help'.\r\n" .   "==========================================\r\n" .   "php>";}socket_write($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;   } /* 客户端输入quit命令时候关闭客户端连接 */   if ($buf == 'q') {    break;   } /* 客户端输入shutdown命令时候服务端和客户端都关闭 */   if ($buf == 'shutdown') {    socket_close($msgsock);    break 2;   } /* 客户端输入help命令时候输出帮助信息 */   if ($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;   } /* 客户端输入命令不存在时提示信息 */   $talkback = "PHP: unknow command '$buf'.\r\nphp> ";   socket_write($msgsock, $talkback, strlen($talkback));   echo "$buf\n";} while (true);socket_close($msgsock);}while (true);/* 关闭Socket连接 */socket_close($socket);?>

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