How can We verify Captcha with Ajax in Codeigniter?

Captcha is necessary part of any form. But if we see with end user point of view, a user feels bad when he/she has to give a right verification code and also have to face an error message if it is invalid code. “I don’t like Captcha and even i didn’t design any form with Captcha”.

If we give captcha verification using ajax, then it reduces user’s troubles.

We can check captcha on blur event or on submitting a form and alert the user about invalid code entered.

In Codeigniter ( i used it CI in some place ) it is easy to do that:

In first step you will show captcha using CI method in simple way. Example:

In html:

And in your controller:

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