grapheme_substr_ascii  434 ext/intl/grapheme/grapheme_string.c 		grapheme_substr_ascii((char *)str, str_len, start, length, ZEND_NUM_ARGS(), (char **) &sub_str, &sub_str_len);
grapheme_substr_ascii   26 ext/intl/grapheme/grapheme_util.h void grapheme_substr_ascii(char *str, int32_t str_len, int32_t f, int32_t l, int argc, char **sub_str, int *sub_str_len);