add_index_str     421 Zend/zend_API.h ZEND_API int add_index_str(zval *arg, zend_ulong idx, zend_string *str);
add_index_str    4570 ext/standard/basic_functions.c 			add_index_str(retval, hash_key->h, zend_string_copy(Z_STR_P(entry)));
add_index_str    2688 ext/standard/string.c 				add_index_str(return_value, num_index, result);