testing

AphrontView.php
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			<?php

			/*
			* Copyright 2011 Facebook, Inc.
			*
			* Licensed under the Apache License, Version 2.0 (the "License");
			* you may not use this file except in compliance with the License.
			* You may obtain a copy of the License at
			*
			* http://www.apache.org/licenses/LICENSE-2.0
			*
			* Unless required by applicable law or agreed to in writing, software
			* distributed under the License is distributed on an "AS IS" BASIS,
			* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
			* See the License for the specific language governing permissions and
			* limitations under the License.
			*/

			abstract class AphrontView {

			protected $children = array();

			final public function appendChild($child) {
			$this->children[] = $child;
			return $this;
			}

			final protected function renderChildren() {
			$out = array();
			foreach ($this->children as $child) {
			$out[] = $this->renderSingleView($child);
			}
			return implode('', $out);
			}

			final protected function renderSingleView($child) {
			if ($child instanceof AphrontView) {
			return $child->render();
			} else if (is_array($child)) {
			$out = array();
			foreach ($child as $element) {
			$out[] = $this->renderSingleView($element);
			}
			return implode('', $out);
			} else {
			return $child;
			}
			}

			abstract public function render();

			}