Is the query for an existing taxonomy archive page?

If the $taxonomy parameter is specified, this function will additionally check if the query is for that specific $taxonomy.

If the $term parameter is specified in addition to the $taxonomy parameter, this function will additionally check if the query is for one of the terms specified.

Signature

is_tax( $taxonomy = '', $term = '' )
taxonomy
 (mixed) Optional. Taxonomy slug or slugs.
Default: ''
term
 (mixed) Optional. Term ID, name, slug or array of Term IDs, names, and slugs.
Default: ''

Return

(boolean)

Source

function is_tax( $taxonomy = '', $term = '' ) {
	global $wp_query;

	if ( ! isset( $wp_query ) ) {
		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1' );
		return false;
	}

	return $wp_query->is_tax( $taxonomy, $term );
}
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