wp_get_original_image_url

WordPress Version: 5.6

/**
 * Retrieve the URL to an original attachment image.
 *
 * Similar to `wp_get_attachment_url()` however some images may have been
 * processed after uploading. In this case this function returns the URL
 * to the originally uploaded image file.
 *
 * @since 5.3.0
 *
 * @param int $attachment_id Attachment post ID.
 * @return string|false Attachment image URL, false on error or if the attachment is not an image.
 */
function wp_get_original_image_url($attachment_id)
{
    if (!wp_attachment_is_image($attachment_id)) {
        return false;
    }
    $image_url = wp_get_attachment_url($attachment_id);
    if (!$image_url) {
        return false;
    }
    $image_meta = wp_get_attachment_metadata($attachment_id);
    if (empty($image_meta['original_image'])) {
        $original_image_url = $image_url;
    } else {
        $original_image_url = path_join(dirname($image_url), $image_meta['original_image']);
    }
    /**
     * Filters the URL to the original attachment image.
     *
     * @since 5.3.0
     *
     * @param string $original_image_url URL to original image.
     * @param int    $attachment_id      Attachment ID.
     */
    return apply_filters('wp_get_original_image_url', $original_image_url, $attachment_id);
}