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* @license GNU General Public License version 2 or later; see LICENSE.txt */ namespace Joomla\CMS\Installation\Form\Rule; \defined('_JEXEC') or die; use Joomla\CMS\Form\FormRule; /** * Form Rule class for the prefix DB. * * @since 1.7 */ class PrefixRule extends FormRule { /** * The regular expression to use in testing a form field value. * * @var string * @since 1.7 */ protected $regex = '^[a-z][a-z0-9]*_$'; /** * The regular expression modifiers to use when testing a form field value. * * @var string * @since 1.7 */ protected $modifiers = 'i'; }