I am using this snippet to display ean value for gtin in Woocommerce’s product schema:
add_filter( 'woocommerce_structured_data_product', 'filter_woocommerce_structured_data_product', 10, 2 ); function filter_woocommerce_structured_data_product( $markup, $product ) { if ( empty( $markup[ 'gtin8' ] ) ) { $markup[ 'gtin8' ] = get_post_meta( $product->get_id(), 'ean', true ); } return $markup; }
This works but I need to set “identifier_exists” markup to products that don’t have the custom field ean set. How can I modify my snippet to show the ean value in the markup if it exists, and add the identifier_exists attribute = false to products that don’t have an ean?
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Answer
Try the following:
add_filter( 'woocommerce_structured_data_product', 'custom_schema', 99, 2 ); function custom_schema( $markup, $product ) { $value = $product->get_meta( 'ean' ); $length = strlen($value); if ( ! empty($value) ) { $markup['identifier_exists'] = true; $markup['gtin'.$length] = $value; } else { $markup['identifier_exists'] = false; } return $markup; }
Code goes in functions.php file of the active child theme (or active theme).