/**
  * Convertit DateTime en yyyymmddhhiiss
  *
  * @param string $DateTime le DateTime
  * @param string $separator Separateur (par défaut /)
  * @return yyyymmddhhiiss
  */
 public static function DateTimeToyyyymmddhhiiss($DateTime, $separator = '/')
 {
     if ($DateTime === null) {
         return null;
     }
     $arMask = CopixI18N::getDateTimeMask($separator);
     $tmpArray = sscanf($DateTime, $arMask->mask);
     $arDate = array();
     foreach ($tmpArray as $key => $donnee) {
         $arDate[$arMask->format[$key]] = $donnee;
     }
     if (!isset($arDate['H'])) {
         $arDate['H'] = $arDate['p'] == 'am' ? $arDate['h'] : $arDate['h'] + 12;
     }
     return sprintf("%04d", $arDate['y']) . sprintf("%02d", $arDate['m']) . sprintf("%02d", $arDate['d']) . sprintf("%02d", $arDate['H']) . sprintf("%02d", $arDate['i']) . sprintf("%02d", $arDate['s']);
 }