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                set\_exception\_handler() 函數設置用戶自定義的異常處理函數。 該函數用于創建運行時期間的用戶自己的異常處理方法。 用在沒有用try/catch塊來捕獲的異常,也就是說不管你拋出的異常有沒有人捕獲,如果沒有人捕獲就會進入到該方法中,并且在回調函數調用后異常會中止 **set\_exception\_handler** ( [callable](https://www.php.net/manual/zh/language.types.callable.php) `$exception_handler` ) : [callable](https://www.php.net/manual/zh/language.types.callable.php) ``` function?exception_handler(Throwable $exception)?{ ??echo?"Uncaught?exception:?"?,?$exception->getMessage(),?"\n"; } set_exception_handler('exception_handler'); throw?new?Exception('Uncaught?Exception'); echo?"Not?Executed\n"; ```
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