Fatal error: Uncaught Error: Call to a member function isEmpty() on string in /var/www/pz/releases/20250903_094633/public/planetiron/application/views/modules/catalog/template-elements/index/alphabet.phtml:57 Stack trace: #0 /var/www/pz/releases/20250903_094633/public/planetiron/application/views/modules/catalog/index/index.phtml(104): include() #1 /var/www/pz/releases/20250903_094633/library/Zend/View.php(161): include('/var/www/pz/rel...') #2 /var/www/pz/releases/20250903_094633/library/Zend/View/Abstract.php(888): Zend_View->_run('/var/www/pz/rel...') #3 /var/www/pz/releases/20250903_094633/library/Zend/Controller/Action/Helper/ViewRenderer.php(912): Zend_View_Abstract->render(NULL) #4 /var/www/pz/releases/20250903_094633/library/Zend/Controller/Action/Helper/ViewRenderer.php(933): Zend_Controller_Action_Helper_ViewRenderer->renderScript('index/index.pht...', NULL) #5 /var/www/pz/releases/20250903_094633/library/Zend/Controller/Action/Helper/ViewRenderer.php(972): Zend_Controller_Action_Helper_ViewRenderer->render() #6 in /var/www/pz/releases/20250903_094633/public/planetiron/application/views/modules/catalog/template-elements/index/alphabet.phtml on line 57