Home >php教程 >php手册 >php socket 处理不过来数据流,该如何避免(好像是阻塞了)

php socket 处理不过来数据流,该如何避免(好像是阻塞了)

WBOY
WBOYOriginal
2016-06-13 08:59:38986browse

php socket 处理不过来数据流,该如何避免(好像是阻塞了)

php socket 处理不过来数据流,该如何处理(好像是阻塞了)
需求:php接受一个硬件往8888端口上发送数据,如果收到后,应socket_send函数返回“\xFA\x01\x01\xFF\xAA\xAA\x00\x01\x00\x00\x00\x00\x00\x01”,硬件再接收到socket_send发送的数据后,会“滴”一声,但是问题出现了,一个硬件还好,但是当多个硬件同时连接并同时发送数据时,会出现硬件不能连续的回应(即发出“滴”的声音),也就是说能连续发出“滴”声后,便不在响了,大概几秒钟后,又开始响应了,过一会又不行了,几个连接上的硬件都是这样,我已经用了非阻塞模式,还是会这样,求解决方法,下面贴出代码

PHP code
<!--?php
error_reporting(E_ALL);
set_time_limit(0);
ini_set("allow_call_time_pass_reference",true);

//监听端口
$PORT = 8888;
//最大连接池
$MAX_USERS = 50;
//创建监听端口
//$sock = socket_create_listen($PORT);


$commonProtocol = getprotobyname("tcp");
$sock = socket_create(AF_INET, SOCK_STREAM, $commonProtocol);
@socket_bind($sock, '192.168.1.112
@socket_listen($sock);




if (!$sock)
{
    exit(1);
}
//不阻塞
socket_set_nonblock($sock);

$connections = array();
$input = array();
$close = array();

while (true)
{
    //sleep(3);
    $readfds = array_merge($connections, array($sock));
    $writefds = array();

    //选择一个连接,获取读、写连接通道
    if (socket_select($readfds, $writefds, $e = null, $t=60))
    {
        foreach ($readfds as $rfd)
        {
            //如果是当前服务端的监听连接
            if ($rfd == $sock)
            {
                //接受客户端连接
                $newconn = socket_accept($sock);
                $i = (int)$newconn;
                $reject = '';
                if (count($connections) -->= $MAX_USERS)
                {
                    $reject = "Server full. Try again later.\n";                   
                }                
                //将当前客户端连接放如socket_select选择
                $connections[$i] = $newconn;
                //输入的连接资源缓存容器
                $writefds[$i] = $newconn;               
                //连接不正常
                if ($reject)
                {                  
                    $close[$i] = true;
                }
                else
                {
                    echo "Welcome to the PHP Chat Server!\n";                  
                }               
                //初始化当前连接读取内容的缓存容器
                $input[$i] = "";
                continue;
            }
            //客户端连接
            $i = (int)$rfd;
            //读取
            $tmp = @socket_read($rfd, 14, PHP_NORMAL_READ);
            if (!$tmp)
            {
                //读取不到内容              
                print "connection closed on socket $i\n";
                close($i);
                continue;
            }
            $input[$i] .= $tmp;
            $tmp = substr($input[$i], -1);
            /*if ($tmp != "\r" && $tmp != "\n")
            {
                // no end of line, more data coming
                continue;
            }*/
            $line = trim($input[$i]);
            $input[$i] = "";
            echo &#39;Client >>&#39;.$line."\r\n";
            
            
            
            
            socket_getpeername($connections[$i],&$remoteIP,&$remotePort);
echo $remoteIP."\r\n";
echo $remotePort."\r\n";
//$data=str_split($buffer);
//print_r($data);
$str="\xFA\x01\x01\xFF\xAA\xAA\x00\x01\x00\x00\x00\x00\x00\x01";
 socket_send($connections[$i],$str,strlen($str),0);
            
            
            
            
            
            
        }
        foreach ($writefds as $wfd)
        {
            $i = (int)$wfd;
            $w = socket_write($wfd, "hello");
        }
    }   
}

function close($i)
{
    global $connections, $input, $close;
    socket_shutdown($connections[$i]);
    socket_close($connections[$i]);
    unset($connections[$i]);
    unset($input[$i]);   
    unset($close[$i]);
}
?>


Statement:
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn