$form->addField('email', 'Email Address', 'email');
$form->addField('username', 'Username', 'text', ['required' => true]);
$form->addField('captcha', 'Captcha', 'captcha', [ 'captchaOptions' => [ 'class' => 'image', 'wordlen' => 4, 'timeout' => 300 ] ]);In this example, we are adding a new field to the form with the name "captcha", a label of "Captcha", and a type of "captcha". We are also specifying some additional options for the captcha field, including the number of characters in the captcha image ("wordlen") and the amount of time before the captcha expires ("timeout"). Package Library: This example is using the Zend Form component library.