Why are you putting the captcha in the img directory? You should have
the image source as an action, in your view (ctp) file:
<?php echo $this->Html->image($this->Html-
>url(array('controller'=>'yourcontoroller', 'action'=>'captcha',
time()),true), array('style'=>'','vspace'=>2)); ?>
... that way you can have a new captcha drawn every time from
'yourcontroller'. If you are using the Auth component then remember
to allow the 'captcha' action.
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