isAlphabetic

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Determine if the string is composed of alphabetic characters.

Twine\Str::isAlphabetic() : bool

Examples

$string = new Twine\Str('JohnPinkerton');

        $string->isAlphabetic(); // Returns true

$string = new Twine\Str('john pinkerton');

        $string->isAlphabetic(); // Returns false