deleting the header and background images from media / library doesn't invalidate these files for the theme

[Denis-de-Bernardy]

when they're deleted, the theme options should get reset accordingly.

[ocean90]

This code would reset the options, if you visit the options page or the frontend you get the default images again. Don't know where we can place this.

function update_theme_mods( $id ) {
	if ( get_header_image() || get_background_image) {
		if ( get_header_image() == wp_get_attachment_url( $id ) )
			remove_theme_mod( 'header_image' );
		elseif ( get_background_image() == wp_get_attachment_url( $id ) )
			remove_theme_mod( 'background_image' );
	}
}

add_action( 'delete_attachment', 'update_theme_mods' );

[ocean90]

After talk with nacin I have inserted it into theme.php.

[ryan]

Note that this will only work for the current theme. Inactive themes pointing to deleted attachments won't be updated. I think that is acceptable.

[nacin]

(In [14850]) Invalidate header/background images for the current theme when the attachment is deleted. props ocean90, fixes #12467.