Structure for a Zend_Form_Element_Capcha() as an image

Zend Form Captcha.php

<?php     

 $captcha = new Zend_Form_Element_Captcha('captcha', // This is the name of the input field
                                                array('label' => 'Are you human ?',
                                                        'captcha' => array( // Here comes the magic...
                                                        // First the type...
                                                        'captcha' => 'Image',
                                                        // Length of the word...
                                                        'wordLen' => 6,
                                                        // Captcha timeout, 5 mins
                                                        'timeout' => 300,
                                                        // What font to use...
                                                        'font' => '/mnt/core/www/images/maian.ttf',
                                                        // Where to put the image
                                                        'imgDir' => '/mnt/core/www/images/',
                                                        // URL to the images
                                                        'imgUrl' => 'http://www.yourdomain.com',
                                                )));


  $this->addElement($captcha);




?>