WP_Error::copy_errors( WP_Error $from, WP_Error $to )

Source

protected static function copy_errors( WP_Error $from, WP_Error $to ) {
	foreach ( $from->get_error_codes() as $code ) {
		foreach ( $from->get_error_messages( $code ) as $error_message ) {
			$to->add( $code, $error_message );
		}

		foreach ( $from->get_all_error_data( $code ) as $data ) {
			$to->add_data( $data, $code );
		}
	}
}

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