"Id", "post_title" => "Title", "post_content" => "Description", "post_excerpt" => "Short Description", ); public $display_name = 'Field'; public function getValue($post, $field) { if ('name' === $field['value']) { $field['value'] = 'post_title'; } return isset($post->{$field['value']}) ? $post->{$field['value']} : ''; } }