66 lines
1.9 KiB
PHP
66 lines
1.9 KiB
PHP
<?php
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class HTMLPurifier_Filter_YouTube extends HTMLPurifier_Filter
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{
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/**
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* @type string
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*/
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public $name = 'YouTube';
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/**
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* @param string $html
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* @param HTMLPurifier_Config $config
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* @param HTMLPurifier_Context $context
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* @return string
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*/
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public function preFilter($html, $config, $context)
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{
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$pre_regex = '#<object[^>]+>.+?' .
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'(?:http:)?//www.youtube.com/((?:v|cp)/[A-Za-z0-9\-_=]+).+?</object>#s';
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$pre_replace = '<span class="youtube-embed">\1</span>';
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return preg_replace($pre_regex, $pre_replace, $html);
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}
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/**
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* @param string $html
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* @param HTMLPurifier_Config $config
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* @param HTMLPurifier_Context $context
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* @return string
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*/
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public function postFilter($html, $config, $context)
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{
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$post_regex = '#<span class="youtube-embed">((?:v|cp)/[A-Za-z0-9\-_=]+)</span>#';
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return preg_replace_callback($post_regex, array($this, 'postFilterCallback'), $html);
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}
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/**
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* @param $url
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* @return string
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*/
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protected function armorUrl($url)
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{
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return str_replace('--', '--', $url);
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}
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/**
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* @param array $matches
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* @return string
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*/
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protected function postFilterCallback($matches)
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{
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$url = $this->armorUrl($matches[1]);
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return '<object width="425" height="350" type="application/x-shockwave-flash" ' .
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'data="//www.youtube.com/' . $url . '">' .
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'<param name="movie" value="//www.youtube.com/' . $url . '"></param>' .
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'<!--[if IE]>' .
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'<embed src="//www.youtube.com/' . $url . '"' .
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'type="application/x-shockwave-flash"' .
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'wmode="transparent" width="425" height="350" />' .
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'<![endif]-->' .
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'</object>';
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}
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}
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// vim: et sw=4 sts=4
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