ctype_xdigit

(PHP 4 >= 4.0.4)

ctype_xdigit --  Check for character(s) representing a hexadecimal digit

Description

bool ctype_xdigit ( string c)

주의

This extension is EXPERIMENTAL. The behaviour of this extension -- including the names of its functions and anything else documented about this extension -- may change without notice in a future release of PHP. Use this extension at your own risk.