/usr/share/php/Horde/Text/Filter.php is in php-horde-text-filter 2.2.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/**
* Horde_Text_Filter:: is a parent class for defining stackable text filters.
*
* Copyright 1999-2013 Horde LLC (http://www.horde.org/)
*
* See the enclosed file COPYING for license information (LGPL). If you
* did not receive this file, see http://www.horde.org/licenses/lgpl21.
*
* @author Chuck Hagenbuch <chuck@horde.org>
* @author Jan Schneider <jan@horde.org>
* @category Horde
* @license http://www.horde.org/licenses/lgpl21 LGPL 2.1
* @package Text_Filter
*/
class Horde_Text_Filter
{
/**
* Attempts to return a concrete instance based on $driver.
*
* @param string $driver Either a driver name, or the full class name to
* use (class must extend Horde_Text_Filter_Base).
* @param array $params A hash containing any additional configuration
* parameters a subclass might need.
*
* @return Horde_Text_Filter_Base The newly created concrete instance.
* @throws Horde_Text_Filter_Exception
*/
static public function factory($driver, $params = array())
{
/* Base drivers (in Filter/ directory). */
$class = __CLASS__ . '_' . ucfirst(basename($driver));
if (class_exists($class)) {
return new $class($params);
}
/* Explicit class name, */
$class = $driver;
if (class_exists($class)) {
return new $class($params);
}
throw new Horde_Text_Filter_Exception(__CLASS__ . ': Class definition of ' . $driver . ' not found.');
}
/**
* Applies a set of patterns to a block of text.
*
* @param string $text The text to filter.
* @param mixed $filters The list of filters (or a single filter).
* @param mixed $params The list of params to use with each filter.
*
* @return string The transformed text.
* @throws Horde_Text_Filter_Exception
*/
static public function filter($text, $filters = array(), $params = array())
{
if (!is_array($filters)) {
$filters = array($filters);
$params = array($params);
}
$params = array_values($params);
foreach (array_values($filters) as $num => $filter) {
$filterOb = self::factory($filter, isset($params[$num]) ? $params[$num] : array());
$patterns = $filterOb->getPatterns();
/* Pre-processing. */
$text = $filterOb->preProcess($text);
/* str_replace() simple patterns. */
if (isset($patterns['replace'])) {
$text = str_replace(array_keys($patterns['replace']), array_values($patterns['replace']), $text);
}
/* preg_replace complex patterns. */
if (isset($patterns['regexp'])) {
$new_text = preg_replace(array_keys($patterns['regexp']), array_values($patterns['regexp']), $text);
if (strlen($new_text) ||
(preg_last_error() != PREG_BACKTRACK_LIMIT_ERROR)) {
$text = $new_text;
}
}
/* preg_replace_callback complex patterns. */
if (isset($patterns['regexp_callback'])) {
foreach ($patterns['regexp_callback'] as $key => $val) {
$new_text = preg_replace_callback($key, $val, $text);
if (strlen($new_text) ||
(preg_last_error() != PREG_BACKTRACK_LIMIT_ERROR)) {
$text = $new_text;
}
}
}
/* Post-processing. */
$text = $filterOb->postProcess($text);
}
return $text;
}
}
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