php socket编程 读完成后写堵塞

php socket编程 读完成后写阻塞
server端代码 如下：

set_time_limit(0);

 

$host = "127.0.0.1";

$port = 12345;

 

$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP) or die("Could not create	socket\n"); // 创建一个Socket

 

$result = socket_bind($socket, $host, $port) or die("Could not bind tosocket\n"); //绑定Socket到端口

 

$result = socket_listen($socket) or die("Could not set up socket listener\n"); // 开始监听连接

 

$spawn = socket_accept($socket) or die("Could not accept incoming connection\n"); // 处理通信



//若换成循环接收数据，客户端将一直处理等待接收状态

$input = socket_read($spawn, 1024) or die("Could not read data\n");

/* 

while (( $data = socket_read($spawn, 1024)) != false) 

	$input .= $data;

*/ 



echo 'input:', strlen($input), "\n";

 

$output = date("Y-m-d H:i:s"). "\n"; //处理客户端输入并返回结果

 

echo "output:", $output, "\n";

 

//	数据传送 向客户端写入返回结果

socket_write($spawn, $output, strlen($output)) or die("Could not write output\n");	

 

// 关闭sockets

socket_close($spawn);

socket_close($socket);

set_time_limit(0);

 

$host = "127.0.0.1";

$port = 12345;

 

$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)or die("Could not create	socket\n"); // 创建一个Socket

 

$connection = socket_connect($socket, $host, $port) or die("Could not connet server\n");    //  连接

 

socket_write($socket, "time") or die("Write failed\n"); // 数据传送 向服务器发送消息



echo 'wait for data';



while (($buffer = socket_read($socket, 1024))!=false) {

    echo("Data sent was: time\nResponse was:" . $buffer . "\n");

}

 

socket_close($socket);

while (true) {

    $msg = socket_accept ($socket);               // 接受一个SOCKET

    if (!$msg) {

        echo "socket_accept() failed:".socket_strerror ($msg)."\n";

        break;

    }

    while (true) {

        $command = strtoupper (trim (socket_read ($msg, 1024))); //等待客户端数据

        if (!$command) break;

        //相关处理，比如直接回显

        socket_write ($msg, $command, strlen ($command));

    }

    socket_close ($msg);

    if ($command == "QUIT") //如果收到的是通讯结束

        break;

}

socket_close ($socket);                   // 关闭SOCKET