以编程方式将图像上载到Wordpress

Question

I'm trying to programmatically upload images to the media library by taking an ACF url, running it through the Wordpress function and then updating a taxonomy field.

I know for a fact that $icon is the correct URL and the update_field function is correct.

The part that is going wrong is the upload image part. I think I've followed the documentation correctly but no image is uploaded into the library and nothing is connected to the ACF field on the taxonomy.

Where am I going wrong?

    // Icon
    $icon = get_field('icon', $term->taxonomy . '_' . $term->term_id);
    $field_key = "field_5ad5e7e5e295c";

    if($icon != "") {
      // The ID of the post this attachment is for.
      $return = "id";

      // Make sure that this file is included, as wp_generate_attachment_metadata() depends on it.
      require_once(ABSPATH . 'wp-admin/includes/media.php');
      require_once(ABSPATH . 'wp-admin/includes/file.php');
      require_once(ABSPATH . 'wp-admin/includes/image.php');

      // Generate the metadata for the attachment, and update the database record.
      $attach_id = media_sideload_image($icon, $post_id, $desc, id);


      update_field( $field_key, $attach_id, $taxonomy.'_'.$french );
      update_field( $field_key, $attach_id, $taxonomy.'_'.$german );
      update_field( $field_key, $attach_id, $taxonomy.'_'.$italian );
      update_field( $field_key, $attach_id, $taxonomy.'_'.$russian );
      update_field( $field_key, $attach_id, $taxonomy.'_'.$spanish );
    }

Answer 1

I've actually found a really simple way around... it doesn't solve my question as such as I've approached it a different way.

The url of the media item obviously already exists in the media library. Therefore I just need the item id of it by looking via the url.

    // Icon
    $icon = get_field('icon', $term->taxonomy . '_' . $term->term_id);
    $field_key = "field_5ad5e7e5e295c";

    if($icon != "") {

      $item = attachment_url_to_postid( $icon );

      update_field( $field_key, $item, $taxonomy.'_'.$french );
      update_field( $field_key, $item, $taxonomy.'_'.$german );
      update_field( $field_key, $item, $taxonomy.'_'.$italian );
      update_field( $field_key, $item, $taxonomy.'_'.$russian );
      update_field( $field_key, $item, $taxonomy.'_'.$spanish );
    }