Create a custom form and add there: $options = array('all' => get_string('any'), 'm' => 'Maths'); $mform->addElement('select', 'subject', get_string('subject', 'block_community'), $options, array('id' => 'communitysubject')); unset($options); $mform->addHelpButton('subject', 'subject', 'block_community'); $this->init_javascript_enhancement('subject', 'smartselect', array('selectablecategories' => true, 'mode' => 'compact'), array('noresults', array('allday', 'calendar'))); Render the form, browse source code and make sure the strings 'noresult','moodle' and 'allday','calendar' are loaded. Before this patch this code will show notice on PHP5 and fatal error on PHP7