LOWALPHA 65 ext/filter/sanitizing_filters.c #define DEFAULT_URL_ENCODE LOWALPHA HIALPHA DIGIT "-._" LOWALPHA 278 ext/filter/sanitizing_filters.c const unsigned char allowed_list[] = LOWALPHA HIALPHA DIGIT "!#$%&'*+-/=?^_`{|}~@.[]"; LOWALPHA 292 ext/filter/sanitizing_filters.c const unsigned char allowed_list[] = LOWALPHA HIALPHA DIGIT SAFE EXTRA NATIONAL PUNCTUATION RESERVED;