`isAlphabetic`

Determine if the string is composed of alphabetic characters.

php

Twine\Str::isAlphabetic() : bool

Examples

php

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

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

php

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

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