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                # 對象和資源的持久化 在傳統的Web開發中,PHP創建的對象、數據、資源等會在請求完畢后全部釋放,導致很難做到持久化。而在WorkerMan中可以輕松做到這些。 在WorkerMan中如果想在內存中永久保存某些數據資源,可以將資源放到全局變量中或者類的靜態成員中。 例如下面的代碼: 用一個全局變量```$connection\_count```保存一個當前進程的客戶端連接數。 ```php <?php use \Workerman\Worker; require_once __DIR__ . '/Workerman/Autoloader.php'; // 全局變量,保存當前進程的客戶端連接數 $connection_count = 0; $worker = new Worker('tcp://0.0.0.0:1236'); $worker->onConnect = function($connection) { // 有新的客戶端連接時,連接數+1 global $connection_count; ++$connection_count; echo "now connection_count=$connection_count\n"; }; $worker->onClose = function($connection) { // 客戶端關閉時,連接數-1 global $connection_count; $connection_count--; echo "now connection_count=$connection_count\n"; }; ``` ## PHP變量作用域參見: <http://php.net/manual/zh/language.variables.scope.php>
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