PHP modifies the message attribute of Exception instance through reflection

By looking at the source code of the Exception class, we can know that the $message attribute is decorated with protect and does not provide a setMessage method.

How should I modify the message for Exception instances? The answer is: reflection!

$exception = new \Exception('haha');
$message = " - use reflection appended message";
$reflectionObject = new \ReflectionObject($exception);
$reflectionObjectProp = $reflectionObject->getProperty('message');
$reflectionObjectProp->setAccessible(true);
$reflectionObjectProp->setValue($exception, $exception->getMessage() . $message);
print_r($exception->getMessage());
haha - use reflection appended message

With the above code, the $message in $exception can be modified! Invincible reflection. . .

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