Extravaganza Math Captcha

How it works

Extravaganza Math Captcha is a small, fast and secure Captcha Class for small sites. E.g. 11 + 36 = ?

Features

• Only two methods. GenerateCaptcha and CheckCaptcha — it's all!
• Random plus and minus operations.

Requirements

• PHP 5.4

Using

Generate captcha

$captcha = ExtravaganzaMathCaptcha::generateCaptcha();

Display generated captcha

echo "How much is {$captcha['A']} {$captcha['action']} {$captcha['B']} = ?"; // How much is 5 + 3 = ?

Check captcha

if(ExtravaganzaMathCaptcha::checkCaptcha($answer) { // $answer = 8
  echo "Captcha correct";
}
else
{
  echo "Bad captcha";
}