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
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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 'Client >>'.$line."\r\n";
socket_getpeername($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]);
}
?>
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