isxdigit()

    
Also See:   fisdir isalnum isalpha isascii iscntrl isdigit isgraph islower isprint ispunct isspace isupper max min miva_variable_type miva_variable_value sisdir

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Test if all characters are hexadecimal digits (a-f, A-F, 0-9).
Syntax 
isxdigit( string )
Returns 1 if true, 0 if false
  • string = the characters tested
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