define TEST_CONSTANT 'This is a global constant';

class Program {
	const TEST_CONSTANT = 'This is a class constant';

	private void constant_test() {
		const TEST_CONSTANT = 'This is a local constant';
		var_dump(TEST_CONSTANT);
	}

	public void main() {
		int $var = 69;
		var_dump(TEST_CONSTANT);
		$this->constant_test();
		var_dump(TEST_CONSTANT);
		var_dump($this->TEST_CONSTANT);
		const TEST_CONSTANT = 'Local constant overrides a global constant';
		var_dump(TEST_CONSTANT);
	}

}