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<?php |
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/** |
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* RemoveComments |
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* |
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* @author Tim Lochmüller |
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*/ |
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namespace HTML\Sourceopt\Manipulation; |
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/** |
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* RemoveComments |
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*/ |
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class RemoveComments implements ManipulationInterface |
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{ |
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/** |
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* Patterns for white-listing comments inside content |
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* |
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* @var array |
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*/ |
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protected $whiteListCommentsPatterns = []; |
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/** |
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* @param string $html The original HTML |
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* @param array $configuration Configuration |
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* |
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* @return string the manipulated HTML |
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*/ |
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public function manipulate($html, array $configuration = []) |
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{ |
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if (isset($configuration['keep.'])) { |
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$this->whiteListCommentsPatterns = $configuration['keep.']; |
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} |
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// match all styles, scripts and comments |
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$matches = []; |
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preg_match_all( |
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'/(?s)((<!--.*?-->)|(<[ \n\r]*style[^>]*>.*?<[ \n\r]*\/style[^>]*>)|(<[ \n\r]*script[^>]*>.*?<[ \n\r]*\/script[^>]*>))/im', |
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$html, |
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$matches |
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); |
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foreach ($matches[0] as $tag) { |
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if ($this->keepComment($tag) === false) { |
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$html = str_replace($tag, '', $html); |
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} |
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} |
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return $html; |
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} |
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/** |
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* Check if a comment is defined to be kept in a pattern whiteListOfComments |
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* |
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* @param string $commentHtml |
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* |
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* @return boolean |
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*/ |
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protected function keepComment($commentHtml) |
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{ |
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// if not even a comment, skip this |
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if (!preg_match('/^\<\!\-\-(.*?)\-\-\>$/usi', $commentHtml)) { |
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return true; |
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} |
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// if not defined in white list |
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if (!empty($this->whiteListCommentsPatterns)) { |
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$commentHtml = str_replace("<!--", "", $commentHtml); |
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$commentHtml = str_replace("-->", "", $commentHtml); |
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$commentHtml = trim($commentHtml); |
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foreach ($this->whiteListCommentsPatterns as $pattern) { |
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if (preg_match($pattern, $commentHtml)) { |
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return true; |
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} |
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} |
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} |
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return false; |
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} |
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} |
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lochmueller /
sourceopt
