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@ISXDIGIT[string]: Returns 1 if string is entirely composed of hexadecimal digits (0- 9,A-F, a-f); 0 otherwise.

 

See also: @ISALNUM, @ISALPHA, @ISASCII, @ISCNTRL, @ISDIGIT, @ISPRINT, @ISPUNCT, @ISSPACE.

 

Example:

 

echo %@isxdigit[0]

0

 

echo %@isxdigit[7F]

1

 

echo %@isxdigit[0x7F]

1