Reflection allows you to modify the behavior of an object at runtime. Here's an example: class MyClass { private $prop1 = "I'm a class property!"; } $reflector = new ReflectionClass('MyClass'); $property = $reflector->getProperty('prop1'); $property->setAccessible(true); $obj = new MyClass; echo $property->getValue($obj); // Outputs: I'm a class property! In this example, we're using reflection to access a private property of MyClass, which would not be possible with regular object-oriented code.