我正在运行基于 Raymond Fain 在 kirupa 上的教程提供的 php 服务器：
http://www.kirupa.com/developer/flash8/php5sockets_flash8_3.htm
在某种程度上，它工作得很好。问题是，当它接收到某些消息时，它会对该消息执行一些操作，然后将其发送给所有连接的客户端。这里的问题是，一旦客户端数量达到大约 12 个大气高度，向所有客户端发送消息的循环可能需要一段时间（比如 4 秒），并且在这 4 秒期间发送的任何后续消息都会排队最终我们得到超时。
这是向所有客户端发送消息的循环：
function send_Message($allclient, $socket, $buf)
{
$now = microtime(true);
echo 'sending message to '.count($allclient).' clients ';
$msg = "<mbFeed>$buf</mbFeed>\n\0";
foreach($allclient as $client)
{
socket_write($client, $msg, strlen($msg));
}
$end = microtime(true);
echo 'time was '.($end - $now);
}
你会注意到我一直在通过比较微时间来呼应它所花费的时间。问题是 echo 声称整个过程需要很短的时间，比如 0.003 秒，这是我所期望的，但是当我在终端中运行这个脚本时，我看到小旋转图标指向四秒钟，在此期间一切都没有反应。
我的问题如下：有人知道这段时间脚本在做什么吗？我能做些什么来阻止它这样做吗？有没有更有效的方法向所有连接的套接字发送消息？
这是整个套接字文件的代码，如果你需要的话，但我希望这对某些人来说可能很熟悉......
#!/usr/bin/php -q
<?php
/*
Raymond Fain
Used for PHP5 Sockets with Flash 8 Tutorial for Kirupa.com
For any questions or concerns, email me at ray@obi-graphics.com
or simply visit the site, www.php.net, to see if you can find an answer.
*/
//ini_set('display_errors',1);
ini_set('display_startup_errors',1);
error_reporting(E_ALL);
//ini_set('error_log', 'socket_errors.log');
ini_set('log_errors', 'On');
ini_set('display_errors', '1');
error_log('testing');
stream_set_timeout(1,0);
set_time_limit(0);
ob_implicit_flush();
$address = 'xxx.xxx.x.xxx';
$port = xxxx;
function send_Message($allclient, $socket, $buf)
{
$now = microtime(true);
echo 'sending message to '.count($allclient).' clients ';
$msg = "<mbFeed>$buf</mbFeed>\n\0";
foreach($allclient as $client)
{
socket_write($client, $msg, strlen($msg));
}
$end = microtime(true);
echo 'time was '.($end - $now);
}
echo "connecting...
";
//---- Start Socket creation for PHP 5 Socket Server -------------------------------------
if (($master = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)) < 0)
{
echo "socket_create() failed, reason: " . socket_strerror($master) . "\n";
}
socket_set_option($master, SOL_SOCKET,SO_REUSEADDR, 1);
socket_set_nonblock($master);
if (($ret = socket_bind($master, $address, $port)) < 0)
{
echo "socket_bind() failed, reason: " . socket_strerror($ret) . "\n";
}
echo 'socket bind successfull.
';
if (($ret = socket_listen($master, 5)) < 0)
{
echo "socket_listen() failed, reason: " . socket_strerror($ret) . "\n";
}
$read_sockets = array($master);
echo "connected.";
//---- Create Persistent Loop to continuously handle incoming socket messages ---------------------
while (true)
{
$changed_sockets = $read_sockets;
$num_changed_sockets = socket_select($changed_sockets, $write = NULL, $except = NULL, NULL);
echo 'changed sockets length: '.(count($changed_sockets));
foreach($changed_sockets as $key => $socket)
{
if ($socket == $master)
{
if (($client = socket_accept($master)) < 0)
{
echo "socket_accept() failed: reason: " . socket_strerror($msgsock) . "\n";
continue;
}
else
{
socket_set_nonblock($client);
array_push($read_sockets, $client);
}
}
else
{
$bytes = socket_recv($socket, $buffer, 8192, 0);
if ($bytes == 0)
{
unset($read_sockets[$key]);
unset($changed_sockets[$key]);
socket_close($socket);
}
else
{
if (substr($buffer, 0, 3) == "<->")
{
unset($read_sockets[$key]);
unset($changed_sockets[$key]);
socket_close($socket);
$buffer = substr($buffer, 3);
}
$allclients = $read_sockets;
array_shift($allclients);
if (substr($buffer, 0, 3) == ":::") handleSpecial(substr($buffer, 3));
else
{
echo 'allclients length: '.(count($allclients));
send_Message($allclients, $socket, str_replace("\0","",$buffer));
}
}
}
}
}
?>