isdigit()

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

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Test if all characters are digits in the range 0-9.
Syntax 
isdigit( string )
Returns 1 if true, 0 if false
  • string = the characters tested
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