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View File Name : Cleanhtml.php

<?php
/**
 * Copyright 2009-2017 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   Michael Slusarz <jan@horde.org>
 * @category Horde
 * @license  http://www.horde.org/licenses/lgpl21 LGPL 2.1
 * @package  Text_Filter
 */

/**
 * This filter attempts to sanitize HTML by cleaning up malformed HTML tags.
 *
 * Parameters:
 *   - body_only: (boolean) Only return the body data?
 *                DEFAULT: Return the whole HTML document
 *   - charset: (string) Charset of the data.
 *              DEFAULT: UTF-8
 *   - size: (integer) Only filter if data is below this size.
 *           DEFAULT: No default
 *
 * @author   Michael Slusarz <jan@horde.org>
 * @category Horde
 * @license  http://www.horde.org/licenses/lgpl21 LGPL 2.1
 * @package  Text_Filter
 */
class Horde_Text_Filter_Cleanhtml extends Horde_Text_Filter_Base
{
    /**
     * Filter parameters.
     *
     * @var array
     */
    protected $_params = array(
        'body_only' => false,
        'charset' => 'UTF-8',
        'size' => false
    );

    /**
     * Executes any code necessary after applying the filter patterns.
     *
     * @param string $text  The text after the filtering.
     *
     * @return string  The modified text.
     */
    public function postProcess($text)
    {
        if (!Horde_Util::extensionExists('tidy') ||
            (($this->_params['size'] !== false) &&
             (strlen($text) > $this->_params['size']))) {
            return $text;
        }

        $tidy_config = array(
            'enclose-block-text' => true,
            'hide-comments' => true,
            'indent' => false,
            'numeric-entities' => true,
            'preserve-entities' => true,
            'show-body-only' => !empty($this->_params['body_only']),
            'tab-size' => 0,
            'wrap' => 0
        );

        $tidy = new tidy();

        if (Horde_String::lower($this->_params['charset']) == 'us-ascii') {
            if ($tidy->parseString($text, $tidy_config, 'ascii')) {
                $tidy->cleanRepair();
                $text = $tidy->value;
            }
        } elseif ($tidy->parseString(Horde_String::convertCharset($text, $this->_params['charset'], 'UTF-8'), $tidy_config, 'utf8')) {
            $tidy->cleanRepair();
            $text = Horde_String::convertCharset($tidy->value, 'UTF-8', $this->_params['charset']);
        }

        return $text;
    }

}