MathCaptcha

A Simple PHP Math Captcha

Preview

Math in Image

Math in Text

Usage

composer require kmlpandey77/math-captcha

Math in Image

It will return Math in image

Create captcha.php

<?php
require_once 'vendor/autoload.php'; // link to vendor's autoload.php

use Kmlpandey77\MathCaptcha\Captcha;

$captcha = new Captcha();
$captcha->image();

Create form.php

<form action="check.php" method="post">
    <p>
        Answer it <img src="./captcha.php" alt="" valign="middle">  <input type="text" name="captcha">
    </p>
    <p><button type="submit" name="submit">Submit</button></p>
</form>

Math in Text

It will return Math in text

Create form.php

Place this code to top of form.php

<?php
require_once 'vendor/autoload.php'; // link to vendor's autoload.php

use Kmlpandey77\MathCaptcha\Captcha;
?>

And place this code in body

<form action="check.php" method="post">
    <p>
        Answer it <?php echo new Captcha; ?>  <input type="text" name="captcha">
    </p>
    <p><button type="submit" name="submit">Submit</button></p>
</form>

Check

Checks to see if the user entered the correct captcha key

Create check.php

<?php
require_once 'vendor/autoload.php'; // link to vendor's autoload.php
use Kmlpandey77\MathCaptcha\Captcha;

if(isset($_POST['submit'])){

	if(Captcha::check()){

        //valid action

        echo('<font color="green">Answer is valid</font>');
	}else{
		echo('<font color="red">Answer is invalid</font>');
	}
}