2013-02-18 03:48:21 +01:00
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<?php
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namespace PicoFeed;
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2014-10-19 20:42:31 +02:00
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use PicoFeed\Filter\Html;
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2014-05-20 20:20:27 +02:00
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2014-03-30 00:48:29 +01:00
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/**
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* Filter class
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*
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* @author Frederic Guillot
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2014-05-20 20:20:27 +02:00
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* @package picofeed
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2014-03-30 00:48:29 +01:00
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*/
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2013-02-18 03:48:21 +01:00
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class Filter
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{
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2014-05-20 20:20:27 +02:00
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/**
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2014-10-19 20:42:31 +02:00
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* Get the Html filter instance
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2014-03-30 00:48:29 +01:00
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*
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2014-10-19 20:42:31 +02:00
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* @static
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2014-03-30 00:48:29 +01:00
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* @access public
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2014-10-19 20:42:31 +02:00
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* @param string $html HTML content
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* @param string $website Site URL (used to build absolute URL)
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* @return PicoFeed\Filter\Html
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2014-03-30 00:48:29 +01:00
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*/
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2014-10-19 20:42:31 +02:00
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public static function html($html, $website)
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2013-02-18 03:48:21 +01:00
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{
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2014-10-19 20:42:31 +02:00
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$filter = new Html($html, $website);
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return $filter;
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2013-02-18 03:48:21 +01:00
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}
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2014-03-30 00:48:29 +01:00
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/**
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* Escape HTML content
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*
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* @static
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* @access public
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* @return string
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*/
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2014-03-01 14:54:33 +01:00
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public static function escape($content)
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{
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2014-10-19 20:42:31 +02:00
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return @htmlspecialchars($content, ENT_QUOTES, 'UTF-8', false);
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2013-08-04 03:08:44 +02:00
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}
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2014-03-30 00:48:29 +01:00
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/**
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* Remove HTML tags
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*
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* @access public
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* @param string $data Input data
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* @return string
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*/
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2013-08-04 03:08:44 +02:00
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public function removeHTMLTags($data)
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{
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return preg_replace('~<(?:!DOCTYPE|/?(?:html|head|body))[^>]*>\s*~i', '', $data);
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}
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2013-08-31 17:05:45 +02:00
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2014-03-30 00:48:29 +01:00
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/**
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* Remove the XML tag from a document
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*
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* @static
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* @access public
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* @param string $data Input data
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* @return string
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*/
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2013-08-31 17:05:45 +02:00
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public static function stripXmlTag($data)
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{
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2014-03-30 00:48:29 +01:00
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if (strpos($data, '<?xml') !== false) {
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2013-12-16 04:38:06 +01:00
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$data = ltrim(substr($data, strpos($data, '?>') + 2));
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2013-08-31 17:05:45 +02:00
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}
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2013-12-16 04:38:06 +01:00
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do {
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$pos = strpos($data, '<?xml-stylesheet ');
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if ($pos !== false) {
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$data = ltrim(substr($data, strpos($data, '?>') + 2));
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}
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} while ($pos !== false && $pos < 200);
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2013-08-31 17:05:45 +02:00
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return $data;
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}
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2013-09-01 00:37:26 +02:00
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2014-03-30 00:48:29 +01:00
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/**
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2014-04-16 00:15:31 +02:00
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* Strip head tag from the HTML content
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2014-03-30 00:48:29 +01:00
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*
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* @static
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* @access public
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* @param string $data Input data
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* @return string
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*/
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2014-04-16 00:15:31 +02:00
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public static function stripHeadTags($data)
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2013-09-01 00:37:26 +02:00
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{
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2014-04-16 00:15:31 +02:00
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$start = strpos($data, '<head>');
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$end = strpos($data, '</head>');
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if ($start !== false && $end !== false) {
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$before = substr($data, 0, $start);
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$after = substr($data, $end + 7);
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$data = $before.$after;
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}
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return $data;
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2013-09-01 00:37:26 +02:00
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}
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2013-10-04 05:14:39 +02:00
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2014-05-20 20:20:27 +02:00
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/**
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2014-10-19 20:42:31 +02:00
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* Trim whitespace from the begining, the end and inside a string and don't break utf-8 string
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2014-05-20 20:20:27 +02:00
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*
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2014-10-19 20:42:31 +02:00
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* @static
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2014-05-20 20:20:27 +02:00
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* @access public
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2014-10-19 20:42:31 +02:00
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* @param string $value Raw data
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* @return string Normalized data
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2014-05-20 20:20:27 +02:00
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*/
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2014-10-19 20:42:31 +02:00
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public static function stripWhiteSpace($value)
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2014-05-20 20:20:27 +02:00
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{
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2014-10-28 23:40:13 +01:00
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$value = str_replace("\r", ' ', $value);
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$value = str_replace("\t", ' ', $value);
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$value = str_replace("\n", ' ', $value);
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// Break UTF-8 strings (TODO: find a better way)
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// $value = preg_replace('/\s+/', ' ', $value);
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2014-10-19 20:42:31 +02:00
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return trim($value);
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2014-05-20 20:20:27 +02:00
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}
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/**
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2014-10-19 20:42:31 +02:00
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* Dirty quickfixes before XML parsing
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2014-05-20 20:20:27 +02:00
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*
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2014-10-19 20:42:31 +02:00
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* @static
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2014-05-20 20:20:27 +02:00
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* @access public
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2014-10-19 20:42:31 +02:00
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* @param string $data Raw data
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* @return string Normalized data
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2014-05-20 20:20:27 +02:00
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*/
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2014-10-19 20:42:31 +02:00
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public static function normalizeData($data)
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2014-05-20 20:20:27 +02:00
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{
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2014-10-19 20:42:31 +02:00
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$invalid_chars = array(
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"\x10",
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"\xc3\x20",
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"",
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);
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2014-05-20 20:20:27 +02:00
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2014-10-19 20:42:31 +02:00
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foreach ($invalid_chars as $needle) {
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$data = str_replace($needle, '', $data);
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2014-05-20 20:20:27 +02:00
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}
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2014-10-19 20:42:31 +02:00
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return $data;
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2014-05-20 20:20:27 +02:00
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}
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2013-02-18 03:48:21 +01:00
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}
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