unescape_invalid_shortcodes example

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;
}

/** * Filter the `wp_get_attachment_image_context` hook during shortcode rendering. * * When wp_get_attachment_image() is called during shortcode rendering, we need to make clear * that the context is a shortcode and not part of the theme's template rendering logic. * * @since 6.3.0 * @access private * * @return string The filtered context value for wp_get_attachment_images when doing shortcodes. */