function fflcommerce_get_image_placeholder($size = 'shop_small')
 {
     $image_size = fflcommerce_get_image_size($size);
     return apply_filters('fflcommerce_image_placeholder_html', '<img src="' . FFLCOMMERCE_URL . '/assets/images/placeholder.png" alt="Placeholder" width="' . $image_size[0] . '" height="' . $image_size[1] . '" />', $image_size);
 }
 /**
  * Get the main product image or parents image
  *
  * @param string $size
  * @return string HTML
  */
 public function get_image($size = 'shop_thumbnail')
 {
     // Get the image size
     $size = fflcommerce_get_image_size($size);
     // If product has an image
     if (has_post_thumbnail($this->ID)) {
         return get_the_post_thumbnail($this->ID, $size);
     }
     // If product has a parent and that has an image display that
     if (($parent_ID = wp_get_post_parent_id($this->ID)) && has_post_thumbnail($parent_ID)) {
         return get_the_post_thumbnail($this->ID, $size);
     }
     // Otherwise just return a placeholder
     return fflcommerce_get_image_placeholder($size);
 }