options ); $sanitized_value = array(); foreach( $values as $value ) { if ( !in_array( $value, $keys ) ) { $sanitized_value[] = isset( $this->default ) ? $this->default : false; } else { $sanitized_value[] = $value; } } return count( $sanitized_value ) == 1 ? $sanitized_value[0] : $sanitized_value; } }