Post term count

add_shortcode( 'term_count', function( $atts ) {

	$atts = shortcode_atts(

		array(

			'taxonomy'   => '',

			'hide_empty' => 'false',

		),

		$atts,

		'term_count'

	);

	$taxonomy = sanitize_key( $atts['taxonomy'] );

	if ( ! $taxonomy || ! taxonomy_exists( $taxonomy ) ) {

		return '0';

	}

	$terms = get_terms(

		array(

			'taxonomy'   => $taxonomy,

			'hide_empty' => filter_var(

				$atts['hide_empty'],

				FILTER_VALIDATE_BOOLEAN

			),

			'fields'     => 'ids',

		)

	);

	if ( is_wp_error( $terms ) ) {

		return '0';

	}

	return (string) count( $terms );

} );