Captcha Code Authentication

Adds Captcha Code anti-spam methods to WordPress forms. ThisĀ  captcha can be included in the following forms.

  • Comments form
  • Registration form
  • Lost password form
  • Login form.


  1. Download the plugin.
  2. Upload to your blog (/wp-content/plugins/).
  3. Activate it.
  4. Click the ‘Captcha’ menu.
  5. Fill in the options.

Important Note: It is mandatory to save options in this plugin.

You have the options to set following

  • Select the captcha should be either numbers or alphabets or both.
  • Select which are the forms need captcha code.

If you have any queries, please put it in the comments, I will reply you as soon as possible.

To download


If you are interested in translating this plugin, please send the translation to

I have been developing websites & web applications since 2004 and currently working in London as full-stack Senior Web Developer. I utilize and advocate in the layout, design and coding of websites specifically in PHP format. Experienced in developing applications and solutions for a wide range of corporate, charity and public sector clients and having the enthusiasm and ambition to complete projects to the highest standard. My ulitmate focus is on server side programming, release process, automation, and standards based web site & applications especially on Zend Framework. I also have a keen interest in developing Wordpress plugins and contributing to open source projects.

41 thoughts on “Captcha Code Authentication

  1. don

    Uh, I don’t see anywhere HOW to use this PI. I downloaded it, activated it, set the options but now what? Does it create the form, do I copy/paste a text string in my current forms, etc.

    I read over and over just DL and activate then choose options! Okay. and THEN what? How do you actually apply it to your forms? Is there anyone out there that can explain NOT how to DL and NOT how to INSTALL and NOT how to set the options but how to go from hitting Save on the options menu and actually using it with forms?

    I’m guess I’m surprised that others don’t seem to have a problem.

  2. me

    NOT A PLUGIN FOR HEAVY SITES!!! The code should be reviewed before thinking about using this plugin. We used this plugin on a site that gets hit about 15 times a min, with tons of unique sessions. The problem is that the plugin creates a session for ever user that hits the site and uses the PHP file session handling which is pretty slow and over time you will see performance issues on your website. There is no reason to create a session when someone hits the site and isn’t even viewing a captcha.

    //runs every time wordpress is loaded
    add_action(‘init’, ‘wp_captcha_init_sessions’);

    //runs this function every time
    function wp_captcha_init_sessions(){
    //creates a session for every user that hits the site

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