is_taxonomy_hierarchical( string $taxonomy ): bool

Determines whether the taxonomy object is hierarchical.


Checks to make sure that the taxonomy is an object first. Then Gets the object, and finally returns the hierarchical value in the object.

A false return value might also mean that the taxonomy does not exist.

For more information on this and similar theme functions, check out the Conditional Tags article in the Theme Developer Handbook.

Top ↑


$taxonomy string Required
Name of taxonomy object.

Top ↑


bool Whether the taxonomy is hierarchical.

Top ↑


File: wp-includes/taxonomy.php. View all references

function is_taxonomy_hierarchical( $taxonomy ) {
	if ( ! taxonomy_exists( $taxonomy ) ) {
		return false;

	$taxonomy = get_taxonomy( $taxonomy );
	return $taxonomy->hierarchical;

Top ↑


Version Description
2.3.0 Introduced.

Top ↑

User Contributed Notes

You must log in before being able to contribute a note or feedback.