   #PHP Manual Character type functions ctype_alnum ctype_cntrl

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                                  ctype_alpha

   (PHP 4 >= 4.0.4)
   ctype_alpha -- Check for alphabetic character(s)

Description

   bool ctype_alpha ( string text)

   Returns TRUE if every character in text is a letter from the current
   locale, FALSE otherwise. In the standard C locale letters are just
   [A-Za-z] and ctype_alpha() is equivalent to (ctype_upper($text) ||
   ctype_lower($text)) if $text is just a single character, but other
   languages have letters that are considered neither upper nor lower
   case.

   See also ctype_upper(), ctype_lower(), and setlocale().
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