Do not throw exception in exception_handler function and __destruct without try-catch

Do NOT throw exception in exception_handler function, if you do it like below, 

the error “Fatal error: Exception thrown without a stack frame in Unknown on line 

0” will occur

set_exception_handler('handle_exception');

function handle_exception($e)

{

    throw new Exception('throwed in handle_exception');

}

throw new Exception('error occur');
if you try-catch the Exception in exception_handler function, it will be ok, the below code will work well
set_exception_handler('handle_exception');

function handle_exception($e)

{

    try {

        throw new Exception('throwed in handle_exception');

    }

    catch (Exception $e) {

        die('catch exception in handle_exception function');

    }

}

throw new Exception('error occur');
Do NOT throw Exception in __destruct like below, or “Fatal error: Exception thrown
without a stack frame in Unknown on line 0” will occur.
class Test {

    function __construct () {}

    function __destruct() {

        throw new Exception('throwed in __destruct');

    }

}

$test = new Test();
but it will work well when try-catch it like below
class Test {

    function __construct () {}

    function __destruct() {

        try {

            throw new Exception('throwed in __destruct');

        }

        catch (Exception $e) {

            die('catch exception in __destruct');

        }

        

    }

}

$test = new Test();