CCaptcha displaying no image yii

Question

I have a user registration form, in which I am trying to display a Captcha image by using Yii widget CCaptcha, however my image link appears broken, Controller file:

Answer 1

The problem was with the controller file,it should have been,

public function accessRules()
    {
        return array(
            array('allow', 
                'actions'=>array('create', 'captcha'),
                'users'=>array('*'),
            ),
    } 

whereas I had mentioned the action for captcha at the end, which I figured out is not allowed in Yii. All the allow actions for * should be together.

Answer 2

Yii captcha will create a png image. A possible explanation for the broken image link would be a missing GD extension or imagick extension, which can be identified by the presence of the following text in your error.log:

call to undefined function imagecreatetruecolor

For details and fix see "call to undefined function imagecreatetruecolor" error in PHP & pChart