Delete settings / options when uninstalling theme

Hi Guido,

You can query those options from options table (settings) through PHPMYADMIN, just select options table o your current installation, click search tab, and in option name type the theme prefix for example “twenty_twelve” followed by % and it should return all options with that name in the beginning..

This code perform that action without the need to go to your db manager:

global $wpdb;
$options = $wpdb->prefix."options";
$query = $wpdb->get_results( "SELECT * FROM $options WHERE option_name LIKE 'theme_prefix_%'");
foreach( $query as $meta ) {
	delete_option( $meta->option_name );
}

or simply delete_option( 'option_name' ) if you know the option names.

You you can apply all of this in an switch_theme action hook: (which gets called when the theme is being deactivated)

add_action('switch_theme', function() {
	global $wpdb;
	$options = $wpdb->prefix."options";
	$query = $wpdb->get_results( "SELECT * FROM $options WHERE option_name LIKE 'theme_prefix_%'");
	foreach( $query as $meta ) {
		delete_option( $meta->option_name );
	}
});

Have a nice day!