'[user-billing-full-name]'); public $display_name = 'User billing full name'; public function getValue($user, $field) { return sprintf( '%1$s %2$s', $this->getUserMetaValue($user, array_merge($field, array('value' => 'billing_first_name'))), $this->getUserMetaValue($user, array_merge($field, array('value' => 'billing_last_name'))) ); } }