WP_Error::add_data() WordPress Method

The WP_Error::add_data() method is used to add data to an error object. This is useful for debugging purposes or for displaying additional information to the user. The first parameter is the key of the data to add, and the second parameter is the value of the data.

WP_Error::add_data( mixed $data, string|int $code = '' ) #

	public function add_data( $data, $code = '' ) {
		if ( empty( $code ) ) {
			$code = $this->get_error_code();
		}

		if ( isset( $this->error_data[ $code ] ) ) {
			$this->additional_data[ $code ][] = $this->error_data[ $code ];
		}

		$this->error_data[ $code ] = $data;
	}