PHP监听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 "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 = "==========================================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;
} /* 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') {
$msg = " PHP Server Help Message rnrn" .
" To quit, type 'quit'. rn" .
" To shut down the server type 'shutdown'.rn" .
" To get help message type 'help'.rn" .
"php> ";
socket_write($msgsock, $msg, strlen($msg));
continue;
} /* 客户端输入命令不存在时提示信息 */
$talkback = "PHP: unknow command '$buf'.rnphp> ";
socket_write($msgsock, $talkback, strlen($talkback));
echo "$bufn";
} while (true);
socket_close($msgsock);
}while (true);
/* 关闭Socket连接 */
socket_close($socket);
?>

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