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                合規國際互聯網加速 OSASE為企業客戶提供高速穩定SD-WAN國際加速解決方案。 廣告
                # Server->defer [TOC] 延后執行一個`PHP`函數。底層會在`EventLoop`循環完成后執行此函數。此函數的目的是為了讓一些`PHP`代碼延后執行,程序優先處理`IO`事件。底層不保證`defer`的函數會立即執行,如果是系統關鍵邏輯,需要盡快執行,請使用`after`定時器實現。 ~~~ function Server->defer(callable $callback); ~~~ * `defer`函數的別名是`swoole_event_defer` * `$callback`為可執行的函數變量,可以是字符串、數組、匿名函數 * 在`onWorkerStart`回調中執行`defer`時,必須要等到有事件發生才會回調 > `defer`函數在`1.8.0`或更高版本可用 ## 使用實例 ~~~ function query($server, $db) { $server->defer(function() use ($db) { $db->close(); }); } ~~~
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