Set product GTIN from SKU in WooCommerce

HowTo Code Snippets
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Set product GTIN from SKU in WooCommerce on child sites.

Snippet Type

Execute on Child Sites

Snippet

add_filter( 'woocommerce_structured_data_product', 'wc_set_gtin_from_sku', 9999, 2 );
 
function wc_set_gtin_from_sku( $markup, $product ) {
   $markup['gtin8'] = str_replace( '-', '', $markup['sku'] );
   return $markup;
}
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