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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