This is one of the easiest and a simple PHP CAPTCHA Script example implemented with PHP form. I have developed this project to give you the basic idea of how to get started with captcha to protect spam.
The project structure below can give you the ide of the thought process we are going to put in to stop spam using our free PHP captcha script.
We have a basic contact form with the name and email values that we will get from the site visitors. We have set up a captcha field inside the form layout. The captcha is required and has the validation implemented on it. It will be triggered when the user submits the form.
\-- php-captcha
|-- config
|--- database.php
|-- assets
|--- css
|--- style.css
|-- scripts
|--- captcha.php
|--- contact_form.php
|-- index.php
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