Programatically create taxonomy terms

wp create term

<?php
// Prevents duplicate term creation, useful when terms need to be programatically generated
function create_term( $slug, $name, $taxonomy ) {
	$term_id = term_exists( $slug, $taxonomy );
	if ( ! $term_id ) {
		$term_data = wp_insert_term( $name, $taxonomy, array( 'slug' => $slug ) );
		if ( $term_data && ! is_wp_error( $term_data ) ) {
			$term_id = $term_data['term_id'];
		}
	}
	else {
		$term_id = $term_id['term_id'];
	}
	return $term_id;
}