isAlpha property

bool isAlpha
getter/setter pair

Implementation

bool isOptional,
    ignoreCase,
    isEmail,
    isUrl,
    isAlpha,
    isAlphanumeric,
    isBase64,
    isCreditCard,
    isDate,
    isJSON,
    isLowercase,
    isUppercase,
    isUUID,
    isIP;