(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 in a future release of PHP without
notice. Be warned and use this extension at your own
risk. |