function do_shortcode( $content, $ignore_html = false ) {
  global $shortcode_tags;

  if ( ! str_contains( $content, '[' ) ) {
    return $content;
  }

  if ( empty( $shortcode_tags ) || ! is_array( $shortcode_tags ) ) {
    return $content;
  }

  // Find all registered tag names in $content.
  preg_match_all( '@\[([^<>&/\[\]\x00-\x20=]++)@', $content, $matches );
  $tagnames = array_intersect( array_keys( $shortcode_tags ), $matches[1] );

  if ( empty( $tagnames ) ) {
    return $content;
  }

  // Ensure this context is only added once if shortcodes are nested.
  $has_filter = has_filter( 'wp_get_attachment_image_context', '_filter_do_shortcode_context' );
  $filter_added = false;

  if ( ! $has_filter ) {
    $filter_added = add_filter( 'wp_get_attachment_image_context', '_filter_do_shortcode_context' );
  }

  $content = do_shortcodes_in_html_tags( $content, $ignore_html, $tagnames );

  $pattern = get_shortcode_regex( $tagnames );
  $content = preg_replace_callback( "/$pattern/", 'do_shortcode_tag', $content );

  // Always restore square braces so we don't break things like <!--[if IE ]>.
  $content = unescape_invalid_shortcodes( $content );

  // Only remove the filter if it was added in this scope.
  if ( $filter_added ) {
    remove_filter( 'wp_get_attachment_image_context', '_filter_do_shortcode_context' );
  }

  return $content;
}