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<?php
/* --------------------------------------------------------------
   StringHelperInterface.inc.php 2015-07-22 gm
   Gambio GmbH
   http://www.gambio.de
   Copyright (c) 2015 Gambio GmbH
   Released under the GNU General Public License (Version 2)
   [http://www.gnu.org/licenses/gpl-2.0.html]
   --------------------------------------------------------------
*/

/**
 * Interface StringHelper
 *
 * @category   System
 * @package    Extensions
 * @subpackage Helpers
 */
interface StringHelperInterface
{
    /**
     * Converts NULL values to empty string inside an array
     *
     * @param array $array
     *
     * @return array
     */
    public function convertNullValuesToStringInArray(array $array);
    
    
    /**
     * Returns a cleaned filename by removing or replacing invalid characters.
     *
     * @param string $p_filename
     *
     * @throws InvalidArgumentException if $p_filename is not a string
     *
     * @return string cleaned filename
     */
    public function correctToValidFilename($p_filename);
}