Description
Applications running on PHP 8.3 can classify characters as digits, letters, whitespace, printable text, and other basic groups. This runtime extension supports validation routines, parsers, form handling, and compatibility code that expects the standard ctype functions. It is dependency-only and has no separate launcher; PHP code uses it when enabled. Developers should remember that ctype checks are simple character tests, not complete validation for user input or locale-sensitive text.