<?php

class SingleClass {

	function doSingle() {}
	function doSingleTwice() {}
}

namespace Two {

	class BaseClass {

		function __construct($a, $b);
		function doDouble() {}
		function doDoubleTwice() {}
	}
}

namespace Three {

	class SingleClass extends \Two\BaseClass {

		function work() {
			$this->work();

		}
	}
}