zval *arr, *prefix, *entry,;
    zend_string *string_key;
    zend_ulong num_key;
    int a;
    if (zend_parse_parameters(ZEND_NUM_ARGS(), "aa", &arr, &prefix) == FAILURE) {
        return;
    }
    a = zend_hash_num_elements(Z_ARRVAL_P(arr)) + zend_hash_num_elements(Z_ARRVAL_P(prefix));
    array_init_size(return_value,a );
    ZEND_HASH_FOREACH_KEY_VAL(Z_ARRVAL_P(arr), num_key, string_key, entry) {
         zend_hash_next_index_insert(Z_ARRVAL_P(return_value), entry);
    } ZEND_HASH_FOREACH_END();