WooCommerce Product Taxonomy Import/Export. Makes it easy to add custom taxonomies to built in WooCommerce import/export feature.

readme.md

WooCommerce Product Taxonomy Import/Export

Add your registered custom product taxonomies to the importer/exporter with the code below.

/**
 * Setup export/import for custom taxonomies.
 *
 * @return void
 */
add_action( 'woocommerce_init', function() {
	// Bail if class does not exist.
	if ( ! class_exists( 'Mai_WooCommerce_Product_Taxonomy_Import_Export' ) ) {
		return;
	}

	// Taxonomies to import/export.
	$taxonomies = [
		'my_taxonomy',
		'another_taxonomy',
	];

	// Setup import/export for each taxonomy.
	foreach ( $taxonomies as $taxonomy ) {
		new Mai_WooCommerce_Product_Taxonomy_Import_Export( $taxonomy );
	}
});

class-woocommerce-product-taxonomy-import-export.php

<?php

// Prevent direct file access.
defined( 'ABSPATH' ) || die;

/**
 * The main plugin class.
 *
 * @version 0.2.0
 *
 * @link https://gist.github.com/helgatheviking/114c8df50cabb7119b3c895b1d854533/
 */
class Mai_WooCommerce_Product_Taxonomy_Import_Export {
	protected $taxonomy;
	protected $key;

	/**
	 * Construct the class.
	 */
	function __construct( $taxonomy ) {
		$this->taxonomy = $taxonomy;
		$this->key      = 'custom_taxonomy_' . $this->taxonomy;

		$this->hooks();
	}

	/**
	 * Add hooks.
	 *
	 * @since 0.1.0
	 *
	 * @return void
	 */
	function hooks() {
		add_filter( 'woocommerce_product_export_column_names',                [ $this, 'add_column' ] );
		add_filter( 'woocommerce_product_export_product_default_columns',     [ $this, 'add_column' ] );
		add_filter( "woocommerce_product_export_product_column_$this->key",   [ $this, 'export_taxonomy' ], 10, 2 );
		add_filter( 'woocommerce_csv_product_import_mapping_options',         [ $this, 'add_column' ] );
		add_filter( 'woocommerce_csv_product_import_mapping_default_columns', [ $this, 'add_mapping_column' ] );
		add_filter( 'woocommerce_product_importer_parsed_data',               [ $this, 'parse_json' ], 10, 2 );
		add_filter( 'woocommerce_product_import_inserted_product_object',     [ $this, 'set_taxonomy' ], 10, 2 );
	}

	/**
	 * Add CSV columns for exporting extra data.
	 *
	 * @since 0.1.0
	 *
	 * @param array $columns
	 *
	 * @return array
	 */
	function add_column( $columns ) {
		$taxonomy_obj = $this->get_taxonomy( $this->taxonomy );

		// Bail if no taxonomy.
		if ( ! $taxonomy_obj ) {
			return $columns;
		}

		$columns[ $this->key ] = $taxonomy_obj->labels->name;

		return $columns;
	}

	/**
	 * Adds contents data column content.
	 *
	 * @since 0.1.0
	 *
	 * @param mixed      $value
	 * @param WC_Product $product
	 *
	 * @return mixed
	 */
	function export_taxonomy( $value, $product ) {
		// Get the terms for the product.
		$slugs = get_terms(
			[
				'object_ids' => $product->get_ID(),
				'taxonomy'   => $this->taxonomy,
				'fields'     => 'slugs',
			]
		);

		// If we have terms, encode them.
		if ( $slugs && ! is_wp_error( $slugs ) ) {
			$value = implode( ',', $slugs );
		}

		return $value;
	}

	/**
	 * Add automatic mapping support for custom columns.
	 *
	 * @since 0.1.0
	 *
	 * @param array $columns
	 *
	 * @return array
	 */
	function add_mapping_column( $columns ) {
		$taxonomy_obj = $this->get_taxonomy( $this->taxonomy );

		// Bail if no taxonomy.
		if ( ! $taxonomy_obj ) {
			return $columns;
		}

		$columns[ $taxonomy_obj->labels->name ] = $this->key;

		return $columns;
	}

	/**
	 * Decode data items and parse JSON IDs.
	 *
	 * @since 0.1.0
	 *
	 * @param array                   $parsed_data
	 * @param WC_Product_CSV_Importer $importer
	 *
	 * @return array
	 */
	function parse_json( $parsed_data, $importer ) {
		// Bail if no data.
		if ( ! isset( $parsed_data[ $this->taxonomy ] ) || empty( $parsed_data[ $this->taxonomy ] ) ) {
			return $parsed_data;
		}

		// Decode the data.
		$data = json_decode( $parsed_data[ $this->taxonomy ], true );

		// Unset the original data.
		unset( $parsed_data[ $this->taxonomy ] );

		// If we have data, add it back to the parsed data.
		if ( $data && is_array( $data ) ) {
			$parsed_data[ $this->taxonomy ] = [];

			foreach ( $data as $term_name ) {
				$parsed_data[ $this->taxonomy ][] = $term_name;
			}
		}

		return $parsed_data;
	}

	/**
	 * Set taxonomy.
	 *
	 * @since 0.1.0
	 *
	 * @param array $product
	 *
	 * @return array
	 */
	function set_taxonomy( $product, $data ) {
		if ( ! $product instanceof WC_Product ) {
			return $product;
		}

		// Bail if no data.
		if ( ! isset( $data[ $this->key ] ) || empty( $data[ $this->key ] ) ) {
			return $product;
		}

		// Get terms.
		$slugs = explode( ',', $data[ $this->key ] );

		// Bail if no terms.
		if ( ! $slugs ) {
			return $product;
		}

		// Set the terms.
		wp_set_object_terms( $product->get_id(), $slugs, $this->taxonomy );

		return $product;
	}

	/**
	 * Get taxonomy object.
	 *
	 * @since 0.1.0
	 *
	 * @param string $taxonomy
	 *
	 * @return WP_Taxonomy
	 */
	function get_taxonomy( $taxonomy ) {
		static $cache = [];

		if ( isset( $cache[ $taxonomy ] ) ) {
			return $cache[ $taxonomy ];
		}

		$cache[ $taxonomy ] = get_taxonomy( $taxonomy );

		return $cache[ $taxonomy ];
	}
}

static cache variable is returning just the first taxonomy name, here my fixed version:

    function get_taxonomy( $taxonomy ) {
        static $cache = [];
    
        if ( isset( $cache[ $taxonomy ] ) ) {
            return $cache[ $taxonomy ];
        }
    
        $cache[ $taxonomy ] = get_taxonomy( $taxonomy );
    
        return $cache[ $taxonomy ];
    }

@carloslato good catch! I'll update the gist when I'm back at my desk. Thanks 🙏

Thank you both, saved my lot of time.... happy coding

Just updated the main class to 0.2.0 with @carloslato's fix. Sorry, I forgot about it! Thanks again :). @carloslato I edited your comment to only show the fixed method, just to keep the comments shorter here. Hope you don't mind!