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filter is not described

get_terms_orderby filter-hook . WP 2.8.0

Filters the ORDERBY clause of the terms query.

Usage

add_filter( 'get_terms_orderby', 'filter_function_name_5176', 10, 3 );
function filter_function_name_5176( $orderby, $args, $taxonomies ){
	// filter...

	return $orderby;
}
$orderby(string)
ORDERBY clause of the terms query.
$args(array)
An array of terms query arguments.
$taxonomies(array)
An array of taxonomies.

Where the hook is called

WP_Term_Query::parse_orderby()
wp-includes/class-wp-term-query.php 860
$orderby = apply_filters( 'get_terms_orderby', $orderby, $this->query_vars, $this->query_vars['taxonomy'] );

Where the hook is used (in WP core)

Does not used.