Thêm tiền tố sau giá trong woo

// define the woocommerce_get_price_html callback 
function filter_woocommerce_get_price_html( $price, $instance ) { 
    // make filter magic happen here... 
    return $price; 
}; 
         
// add the filter 
add_filter( 'woocommerce_get_price_html', 'filter_woocommerce_get_price_html', 10, 2 ); 

function filter_woocommerce_get_price_html( $price, $instance ) { 
    $price = $price."/".get_field('donvitinh');
    return $price; 
}; 
add_filter( 'woocommerce_get_price_html', 'filter_woocommerce_get_price_html', 10, 2 );