This topic describes different categories of EdgeScript built-in functions and the functions that are included in each category.

Category Function included
Logical functions and, or, not, eq, ne, and null.
Numeric functions add, sub, mul, div, mod, gt, ge, lt, le, floor, and ceil.
String functions substr, concat, upper, lower, len, byte, match_re, capture_re, gsub_re, split, split_as_key, tohex, tostring, tochar, reverse, find, format, and tobin.
Dictionary functions set, get, foreach, del, insert, sort, and remove.
Array functions arr_concat, arr_insert, arr_remove, arr_sort, and arr_len.
Request processing functions add_req_header, del_req_header, add_rsp_header, del_rsp_header, get_rsp_header, encode_args, decode_args, add_rsp_cookie, rewrite, say, print, exit, set_status, get_status, and get_body_data.
Request logic functions req_uri, req_uri_basename, req_uri_ext, req_uri_seg, req_uri_arg, req_uri_query_string, req_scheme, req_method, req_host, req_user_agent, req_referer, req_cookie, req_first_x_forwarded, req_header, and req_id.
Storage functions shm_get, shm_set, shm_add, shm_del, shm_incr, redis_get, and redis_set.
Time functions today, time, now, localtime, utctime, cookie_time, http_time, parse_http_time, and unixtime.
Cipher algorithm functions aes_new, aes_enc, aes_dec, sha1, sha2, hmac, hmac_sha1, md5, and md5_bin.
JSON functions json_enc and json_dec.
HTTP functions http_request
Miscellaneous functions base64_enc, base64_dec, url_escape, url_unescape, rand, rand_hit, rand_bytes, crc, tonumber, base64_enc_safe, base64_dec_safe, and randomseed.