$maxLength public property The maximum length for randomly generated

$minLength public property The minimum length for randomly generated

$offset public property The offset between characters. Defaults

$verifyCode public read-only property The verification

getVerifyCode() public method Gets the verification code

renderImage() protected method Renders the CAPTCHA image

validate() public method Validates the input to see if

generateVerifyCode() protected method Generates a new

generateValidationHash() public method Generates a hash

$foreColor public property The font color. For example, 0x55FF00