PHP 忒聊 綴豖 ヶ輛 ctype_xdigit (PHP 4 = 4.0.4) Description Returns TRUE if every character in text is a hexadecimal 'digit', that is a decimal digit or a character from [A-Fa-f], FALSE otherwise. See also ctype_digit(). 綴豖 れ萸 ヶ輛 ctype_upper 奻珨撰 Database (dbm-style) abstraction layer functions