PHP Captcha Scripts and Tutorial with reCAPTCHA

PHP Captcha Scripts and Tutorial with Arithmetic Question

PHP Captcha Scripts and Tutorial with Text Copying

PHP Captcha Scripts and Tutorial with Simple Question Answering

PHP Captcha Scripts and Tutorial with reCAPTCHA

This page is a tutorial on "PHP Captcha Scripts and Tutorial with reCAPTCHA." Our overall method is to sign up with reCaptcha and use the materials and examples they provide. Both PHP Captcha Scripts and Tutorial with Arithmetic Question and PHP Captcha Scripts and Tutorial with Text Copying use the PHP GD Library and a TrueType font and PHP to make captchas. But this script just displays the reCAPTCHA generated by reCaptcha, as you can see in the example above.

Using reCaptcha is the safest free way to do captchas, and it's popular as well as effective. But it's more fun to make your own captcha system, like the ones we supply. If you are prioritizing safety and popularity and effectiveness over fun, use reCAPTCHA.

A CAPTCHA is a program that can tell whether its user is a human or a computer, unless it gets fooled by a very smart bot. You've probably seen lots of captchas. They are colorful images with distorted text at the bottom of Web registration forms, logins, polls, etc. CAPTCHAs are used by many websites to prevent abuse from "bots," or automated programs usually written to read registration forms and then sign up like a human would. Bots' goals are mostly to generate spam. No computer program can read distorted text as well as humans can, so bots cannot navigate sites protected by CAPTCHAs. (Yet.)

The rest of this page assumes you wish to use a reCAPTCHA captcha script. They can be used on anything captchas can be used on. Our PHP Captcha Scripts and Tutorial with reCAPTCHA script isn't a script—it's a bunch of them. Five of our 6 Personal Status Boards (PSBs) have register-with-captcha.php scripts included with them that use the reCAPTCHA method. Anywhere you want a reCAPTCHA captcha you may apply this method. It is FREE. register-with-captcha.php outlines how you can apply this method for your own site registration scripts. We use Personal Status Board (PSB) registration as an example.

Registration-PHP-Code-for-Multiple-PSB-Hosts-with-Captcha.html and Registration-PHP-Code-for-Multiple-PSB-Hosts.html are very similar. The only differences are the codes shown in red text. If you get interested in PSBs as you read this, their links are:

Standard Free PSB

PSB Pro Version

Social PSB

Social PSB Plus (with Email)

Business PSB

Business PSB Plus (with Email)

All but the first of these has a register-with-captcha.php script that comes with it.

Personal Status Boards (PSB™)

PHP Captcha Scripts and Tutorial with reCAPTCHA