In WooCommerce, you can use the wc_get_attribute_taxonomies() function to retrieve a list of all the attribute taxonomies (attributes) that have been registered for products. This function returns an array of attribute taxonomy objects, which contain various properties that you can use to access the attribute’s details.

Here is an example of how you can use the wc_get_attribute_taxonomies() function to retrieve the list of attribute taxonomies and their values:

Copy code$attributes = wc_get_attribute_taxonomies();
foreach ( $attributes as $attribute ) {
    $attribute_name = $attribute->attribute_label;
    $attribute_values = wc_get_product_terms( $attribute->attribute_id, $attribute->attribute_name, array( 'fields' => 'names' ) );
    // Do something with attribute name and values
}

You can also use the wp_get_object_terms() function to retrieve the attribute values, for example:

Copy code$attributes = wc_get_attribute_taxonomies();
foreach ( $attributes as $attribute ) {
    $attribute_name = $attribute->attribute_label;
    $attribute_values = wp_get_object_terms(0, $attribute->attribute_name, array('fields' => 'names'));
    // Do something with attribute name and values
}

You can also use the get_terms() function to retrieve the attribute values, for example:

Copy code$attributes = wc_get_attribute_taxonomies();
foreach ( $attributes as $attribute ) {
    $attribute_name = $attribute->attribute_label;
    $attribute_values = get_terms( array( 'taxonomy' => $attribute->attribute_name, 'hide_empty' => false ) );
    // Do something with attribute name and values
}

It’s important to note that, you should use the above code snippets after the woocommerce_init action is fired, so that the wc_get_attribute_taxonomies() function and other functions are available.

Also, make sure to check if the attribute exists before trying to retrieve the attribute values, and handle the cases where the attribute does not exist gracefully, and also be aware that the above code will retrieve all the attribute values, even for the non-published products.

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