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<?php
namespace PicoFeed\Filter;
/**
* Filter class
*
* @author Frederic Guillot
* @package Filter
*/
class Filter
{
/**
* Get the Html filter instance
*
* @static
* @access public
* @param string $html HTML content
* @param string $website Site URL (used to build absolute URL)
* @return Html
*/
public static function html($html, $website)
{
$filter = new Html($html, $website);
return $filter;
}
/**
* Escape HTML content
*
* @static
* @access public
* @return string
*/
public static function escape($content)
{
return @htmlspecialchars($content, ENT_QUOTES, 'UTF-8', false);
}
/**
* Remove HTML tags
*
* @access public
* @param string $data Input data
* @return string
*/
public function removeHTMLTags($data)
{
return preg_replace('~<(?:!DOCTYPE|/?(?:html|head|body))[^>]*>\s*~i', '', $data);
}
/**
* Remove the XML tag from a document
*
* @static
* @access public
* @param string $data Input data
* @return string
*/
public static function stripXmlTag($data)
{
if (strpos($data, '<?xml') !== false) {
$data = ltrim(substr($data, strpos($data, '?>') + 2));
}
do {
$pos = strpos($data, '<?xml-stylesheet ');
if ($pos !== false) {
$data = ltrim(substr($data, strpos($data, '?>') + 2));
}
} while ($pos !== false && $pos < 200);
return $data;
}
/**
* Strip head tag from the HTML content
*
* @static
* @access public
* @param string $data Input data
* @return string
*/
public static function stripHeadTags($data)
{
return preg_replace('@<head[^>]*?>.*?</head>@siu','', $data );
}
/**
* Trim whitespace from the begining, the end and inside a string and don't break utf-8 string
*
* @static
* @access public
* @param string $value Raw data
* @return string Normalized data
*/
public static function stripWhiteSpace($value)
{
$value = str_replace("\r", ' ', $value);
$value = str_replace("\t", ' ', $value);
$value = str_replace("\n", ' ', $value);
// $value = preg_replace('/\s+/', ' ', $value); <= break utf-8
return trim($value);
}
/**
* Dirty quickfixes before XML parsing
*
* @static
* @access public
* @param string $data Raw data
* @return string Normalized data
*/
public static function normalizeData($data)
{
$invalid_chars = array(
"\x10",
"\xc3\x20",
"",
);
foreach ($invalid_chars as $needle) {
$data = str_replace($needle, '', $data);
}
return $data;
}
}
|
