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)),
but other languages have letters that are considered neither upper nor
lower case.
See also ctype_upper(),
ctype_lower(), and
setlocale().
