Where is hash_next_index_insert?

Hi Everybody, The docs on extending PHP via C functions describe appending to PHP arrays via a call to 'hash_next_index_insert', however I can find this function defined in none of the php include files??? I can, however, find 'zend_hash_next_index_insert'. Unfortunately this function seems to be looking for a 'zval' rather than a 'pval' (I trid calling it anyhow, which only resulted in program crashes). Surely somebody can set my feet on the path to enlightenment? -Rich Bryant