1# Vowel 2 3- `v::vowel()` 4 5Similar to `v::alnum()`. Validates strings that contains only vowels: 6 7```php 8v::vowel()->validate('aei'); // true 9``` 10 11*** 12See also: 13 14 * [Alnum](Alnum.md) 15 * [Digit](Digit.md) 16 * [Alpha](Alpha.md) 17 * [Consonant](Consonant.md) 18