Automatically assign constructor parameters to private properties

In Scala, a JVM language, constructor parameters become private fields of the class, by default:

class Person(age:Int) {
  def grow() = {
    age += 1
  }
}

I find it handy, as I always use private properties which are the target of dependency injection, in particular constructor injection.
Here's how to emulate this functionality in PHP, with great hacks. I post this code here so it won't be lost in the interwebs.

	<?php
	class AutomatedAssignmentOfConstructorParametersTest extends PHPUnit_Framework_TestCase
	{
	public function testParametersAreAssignedBasingOnTheirNames()
	{
	$object = new MyClass(1, 2);
	$this->assertEquals(1, $object->getFirst());
	$this->assertEquals(2, $object->getSecond());
	}
	}
	class MyClass
	{
	private $first;
	private $second;
	public function __construct($first, $second)
	{
	assignConstructorParameters($this, get_defined_vars());
	}
	public function getFirst()
	{
	return $this->first;
	}
	public function getSecond()
	{
	return $this->second;
	}
	}
	function assignConstructorParameters($object, $constructorParameters)
	{
	$class = get_class($object);
	foreach ($constructorParameters as $name => $value) {
	if ($name == 'this') {
	continue;
	}
	$reflectionProperty = new ReflectionProperty($class, $name);
	$reflectionProperty->setAccessible(true);
	$reflectionProperty->setValue($object, $value);
	$reflectionProperty->setAccessible(false);
	}
	}

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