init() public method Initializes the widget.

run() public method Renders the widget.

registerClientScript() public method Registers the needed

$template public property The template for arranging the CAPTCHA

$options public property The HTML attributes for the input tag

$captchaAction public property The route of the action that generates

getClientOptions() protected method Returns the options

checkRequirements() public static method Checks if there

$imageOptions public property HTML attributes to be applied to