Display brand in single product page (woo)

gistfile1.txt

function gl_brand_logo_shortcode( $atts ) {
    if ( is_admin() ) return '';

    $atts = shortcode_atts([
        'size'   => 'medium',   // thumbnail|medium|large|full o 300x150
        'class'  => 'brand-logo',
        'link'   => 'yes',      // yes|no
        'tax'    => ''          // lascia vuoto per auto-rilevare
    ], $atts, 'brand_logo');

    if ( ! is_product() ) return '';

    $product_id = get_the_ID();
    $taxonomies = array_filter([
        $atts['tax'],
        'pwb-brand',            // Perfect Brands
        'product_brand',        // WooCommerce Brands / YITH
        'yith_product_brand'    // alcune installazioni YITH
    ]);

    $term = null;
    $brand_tax = null;
    foreach ( $taxonomies as $tax ) {
        if ( ! $tax ) continue;
        $terms = get_the_terms( $product_id, $tax );
        if ( ! empty($terms) && ! is_wp_error($terms) ) {
            $term = array_shift($terms);
            $brand_tax = $tax;
            break;
        }
    }
    if ( ! $term ) return '';

    // Prova meta key comuni (Perfect Brands, WC Brands/YITH, e un campo JetEngine personalizzato)
    $meta_keys = ['pwb_brand_image', 'thumbnail_id', 'brand_logo'];
    $image_id = 0;
    foreach ( $meta_keys as $key ) {
        $val = get_term_meta( $term->term_id, $key, true );
        if ( $val ) { $image_id = is_numeric($val) ? (int)$val : 0; break; }
    }
    if ( ! $image_id ) return '';

    $img = wp_get_attachment_image( $image_id, $atts['size'], false, [
        'class' => esc_attr($atts['class']),
        'alt'   => esc_attr($term->name),
        'loading' => 'lazy'
    ]);
    if ( ! $img ) return '';

    if ( $atts['link'] === 'yes' ) {
        $url = get_term_link( $term, $brand_tax );
        if ( ! is_wp_error($url) ) {
            $img = sprintf('<a href="%s" class="brand-logo-link" aria-label="%s">%s</a>',
                esc_url($url),
                esc_attr($term->name),
                $img
            );
        }
    }
    return $img;
}
add_shortcode( 'brand_logo', 'gl_brand_logo_shortcode' );

[brand_logo size="custom-130x100" link="yes"]