Sidebars

if ( ! function_exists( 'custom_sidebars' ) ) {

// Register Sidebars
function custom_sidebars() {

	$args = array(
		'id'            => 'main-sidebar',
		'class'         => 'main sidebar',
		'name'          => __( 'Main Sidebar', 'text_domain' ),
	);
	register_sidebar( $args );

	$args = array(
		'id'            => 'secondary-sidebar',
		'class'         => 'secondary sidebar',
		'name'          => __( 'Secondary Sidebar', 'text_domain' ),
	);
	register_sidebar( $args );

	$args = array(
		'id'            => 'tertiary-sidebar',
		'class'         => 'tertiary sidebar',
		'name'          => __( 'Tertiary Sidebar', 'text_domain' ),
	);
	register_sidebar( $args );

}
add_action( 'widgets_init', 'custom_sidebars' );

}