public static function validate(vB_DomNode $main_node, vB_TemplateParser $parser) { $errors = array(); $parent = $main_node->parentNode(); if ($parent->value != 'if') { $errors[] = 'elseif_not_child_of_if'; } $errors = array_merge($errors, vB_TemplateParser_TagIf::validate($main_node, $parser)); return $errors; }