render.php
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render.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.
			*/

			/**
			* @group markup
			*/
			function phutil_render_tag($tag, array $attributes = array(), $content = null) {
			foreach ($attributes as $k => $v) {
			if ($v === null) {
			continue;
			}
			$v = phutil_escape_html($v);
			$attributes[$k] = ' '.$k.'="'.$v.'"';
			}

			$attributes = implode('', $attributes);

			if ($content === null) {
			return '<'.$tag.$attributes.' />';
			} else {
			return '<'.$tag.$attributes.'>'.$content.'</'.$tag.'>';
			}
			}

			/**
			* @group markup
			*/
			function phutil_escape_html($string) {
			return htmlspecialchars($string, ENT_QUOTES, 'UTF-8');
			}

			function phutil_escape_uri($string) {
			return rawurlencode($string);
			}