Implement CAPTCHA In CodeIgniter


CAPTCHA is a randomly generated string (or a set of images) that appears when verification is required. It is an essential requirement for cutting down the spam at a website. In many cases, it is the only line of defense a website has against bots that spam websites.

CAPTCHA in CodeIgniter

In this tutorial, I will demonstrate how you can easily implement CAPTCHA in your CodeIgniter projects.

Create Controller

The process starts with the creation of the Controller.

Create a file named captcha.php in the Controller folder. Open the file in your code editor and add the following code to it:

Code Explanation

Here is a brief explanation of the various components of the Controller code:

Load CAPTCHA Helper

Form Submission

CAPTCHA Configuration


Create the View

The next step is the creation of the View. for this, create a folder in the View folder. Go into the folder and create another folder with the name captcha. inside this folder, create a file named index.php. Add the following code to the file:

Another Method of Calling CAPTCHA with Validation

Here is another method that is used to call in CAPTCHA through CodeIgniter helper and then validate it.

About the author

Jithendar Dhumal
By Jithendar Dhumal