My Courses > CustomizeWoo > Module 5 > Lesson 03: Custom Fields

Custom Fields


Custom fields (post meta, metadata) allow you to store additional information with each WordPress post (WooCommerce products included). They can then be displayed/used anywhere.


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Useful Links

WooCommerce: Add Custom Product Fields (e.g. RRP) Without a Plugin:

WooCommerce: Add Custom Field to Product Variations:

WordPress Custom Fields:

12 thoughts on “Custom Fields

  1. HI Rodolfo,
    I want to show an specific attribute in the single_product_summary after the price and on the left site. I know you told this in one of the courses but I can’t find the specific course anymore. Can you guide me in the right direction?


    1. Thanks for your question Marco πŸ™‚

      So, to display a custom field you can use (in this case it gets the total sales, but you can get the custom field value with get_post_meta() – here’s an example:

      Let me know

      1. Ciao Rodolfo,
        I am not getting there. The attribute is pa_merk and I want it after woocommerce_single_product_summary. I think it is easy but I am not seeing it. Could you …..:-)

        add_action( 'woocommerce_single_product_summary', 'merk_toevoegen', 10);
         function merk_toevoegen() {
           echo 'pa_merk';
        1. Ah – sorry – so it’s a product attribute. Try with:

          global $product;
          echo $product->get_attribute( 'pa_merk' );
          1. YEP, that’s it. Thanks

            1. And if I want that attribute to link to the archive page?

              1. I would search through the WooCommerce plugin files for the wc_display_product_attributes() function. At some stage within this function you find this for a single attribute:

                $value_name = esc_html( $attribute_value->name );
                if ( $attribute_taxonomy->attribute_public ) {
                	$values[] = '<a href="' . esc_url( get_term_link( $attribute_value->term_id, $attribute->get_name() ) ) . '" rel="tag">' . $value_name . '</a>';
                } else {
                	$values[] = $value_name;

                So, you first need to get the $attribute_value.

                Another option:

                1. Thanks for all that!

  2. Thank you – but I need to just add a number (Item Code) to be displayed – what should be the ‘data type’?

    1. You can just remove that line, as it’s not a price πŸ™‚

  3. Hi Rodolfo,
    I have watched the lesson you have recommended and read the article, but something is still not clear;
    I have used this code – from your website – to add a custom field on variation products:

    // 1. Add custom field input @ Product Data &gt; Variations &gt; Single Variation
    add_action( 'woocommerce_variation_options_pricing', 'bbloomer_add_custom_field_to_variations', 10, 3 ); 
    function bbloomer_add_custom_field_to_variations( $loop, $variation_data, $variation ) {
    woocommerce_wp_text_input( array( 
    'id' =&gt; 'custom_field[' . $loop . ']', 
    'class' =&gt; 'short', 
    'label' =&gt; __( 'Item Code', 'woocommerce' ),
    'value' =&gt; get_post_meta( $variation-&gt;ID, 'custom_field', true )
    // -----------------------------------------
    // 2. Save custom field on product variation save
    add_action( 'woocommerce_save_product_variation', 'bbloomer_save_custom_field_variations', 10, 2 );
    function bbloomer_save_custom_field_variations( $variation_id, $i ) {
        $custom_field = $_POST['custom_field'][$i];
        if ( ! empty( $custom_field ) ) {
            update_post_meta( $variation_id, 'custom_field', esc_attr( $custom_field ) );
        } else delete_post_meta( $variation_id, 'custom_field' );
    // -----------------------------------------
    // 3. Store custom field value into variation data
    add_filter( 'woocommerce_available_variation', 'bbloomer_add_custom_field_variation_data' );
    function bbloomer_add_custom_field_variation_data( $variations ) {
        $variations['custom_field'] = 'Item Code: ' . get_post_meta( $variations[ 'variation_id' ], 'custom_field', true ) . '';
        return $variations;

    Can you let me know what changes I need to add to this code in order for the custom field to be displayed also on simple products pages?
    If it’s to much trouble – can you recommend a professional that can to it for money? I know it’s fairly easy for an experienced developer – I just need it solved fast and I am just in the
    beginning of my WooCommerce programming journey..

    Thank you!

    1. Hello Yonatan!

      For simple products you can use this version:

      Let me know πŸ™‚

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