WordPress Version: 4.6
/**
* Checks that the taxonomy name exists.
*
* @since 2.3.0
* @deprecated 3.0.0 Use taxonomy_exists()
* @see taxonomy_exists()
*
* @param string $taxonomy Name of taxonomy object
* @return bool Whether the taxonomy exists.
*/
function is_taxonomy($taxonomy)
{
_deprecated_function(__FUNCTION__, '3.0.0', 'taxonomy_exists()');
return taxonomy_exists($taxonomy);
}