如何在reactPHP服務器中保持狀態？

Question

ReachPHP服務器。代碼計數的請求數：

$counter = 0; 

$app = function ($request, $response) use ($counter){   
    $response->writeHead(200, array('Content-Type' => 'text/plain')); 
    $response->end($counter); 
    $counter++; 
}; 

$loop = React\EventLoop\Factory::create(); 
$socket = new React\Socket\Server($loop); 
$http = new React\Http\Server($socket, $loop); 

$http->on('request', $app); 
echo "Server running at http://127.0.0.1:1337\n"; 

$socket->listen(1337); 
$loop->run(); 

計數器保持爲0爲每一個請求，我怎樣才能使$ counter變量持續爲所有對服務器的請求？

Answer 1

只需要把& - 符號$櫃檯前參考轉移：

$counter = 0; 

$app = function ($request, $response) use (&$counter){   
    $response->writeHead(200, array('Content-Type' => 'text/plain')); 
    $response->end($counter); 
    $counter++; 
}; 

$loop = React\EventLoop\Factory::create(); 
$socket = new React\Socket\Server($loop); 
$http = new React\Http\Server($socket, $loop); 

$http->on('request', $app); 
echo "Server running at http://127.0.0.1:1337\n"; 

$socket->listen(1337); 
$loop->run(); 

我傻......