File Explorer

<?php

/** This file is part of KCFinder project
  *
  *      @desc Text processing helper class
  *   @package KCFinder
  *   @version 3.12
  *    @author Pavel Tzonkov <sunhater@sunhater.com>
  * @copyright 2010-2014 KCFinder Project
  *   @license http://opensource.org/licenses/GPL-3.0 GPLv3
  *   @license http://opensource.org/licenses/LGPL-3.0 LGPLv3
  *      @link http://kcfinder.sunhater.com
  */

namespace kcfinder;

class text {

/** Replace repeated white spaces to single space
  * @param string $string
  * @return string */

static function clearWhitespaces($string) {
        return trim(preg_replace('/\s+/s', " ", $string));
    }

/** Normalize the string for HTML attribute value
  * @param string $string
  * @return string */

static function htmlValue($string) {
        return
            str_replace('"', "&quot;",
            str_replace("'", '&#39;',
            str_replace('<', '&lt;',
            str_replace('&', "&amp;",
        $string))));
    }

/** Normalize the string for JavaScript string value
  * @param string $string
  * @return string */

static function jsValue($string) {
        return
            preg_replace('/\r?\n/', "\\n",
            str_replace('"', "\\\"",
            str_replace("'", "\\'",
            str_replace("\\", "\\\\",
        $string))));
    }

}

Editing File: helper_text.php