set alt tag and title of product images to product's name, category, subcategories' name, vendor's name

gistfile1.txt

add_filter( 'martfury_image_alt_text', 'ct_martfury_image_alt_text' );
add_filter('wp_get_attachment_image_attributes', 'change_attachement_image_attributes', 20, 2);

function change_attachement_image_attributes( $attr, $attachment ){
	$product_id = get_the_ID();
	$vendor_id = get_post_field( 'post_author', $product_id );
    // Get the WP_User object (the vendor) from author ID
    $vendor = new WP_User($vendor_id);
    $vendor_name = $vendor->display_name;
  // var_dump($product_cat);exit;
    // Get post parent
    $parent = get_post_field( 'post_parent', $attachment);
    // Get post type to check if it's product
    $type = get_post_field( 'post_type', $parent);
    if( $type != 'product' ){
    	// var_dump($type);exit;
        return $attr;
    }
  $cat = get_the_terms( $product_id, 'product_cat' );
	$category_name = '';
	$category_id = '';
	foreach ($cat as $categoria) {
		if($categoria->parent == 0){
		   $category_name = $categoria->name;
		   $category_id = $categoria->term_id;
		}
	}
	$child_terms = get_term_children($category_id, 'product_cat');
	$all_terms   = wp_get_post_terms($product_id, 'product_cat');
	$child_cat = array();
	foreach ( $all_terms as $term ) {

	   $child_cat[] =  $term->name;
	}
    /// Get title
    $title = get_post_field( 'post_title', $parent);
	$child_cat = implode(" - ",$child_cat);
	// $child_cat = explode(" ",$child_cat);
	// $child_cat = implode(" - ",$child_cat);
    $attr['alt'] = $title.' - '.$category_name.' - '.$child_cat.' - '.$vendor_name;
    $attr['title'] = $title.' - '.$category_name.' - '.$vendor_name;

    return $attr;
}