captcha's Introduction

Captcha

It's simply an old-school captcha app.

Requirements

PHP 5.6 or higher
PHP GD Extension

Installation

composer require muhammetsafak/captcha:dev-main

or download and include the file src/Captcha.php.

Usage

The file src/image-captcha.php simply generates and presents a captcha for you. You can edit this file for a custom configuration or create your own.

Configuration

$configs = array(
    'width'         => 200, // Width of captcha image to be created
    'height'        => 70, // Height of captcha image to be created
    'length'        => 7, // The number of characters to be found in the captcha image.
    'font'          => __DIR__ . '/src/AHGBold.ttf', // Defines the font of the captcha characters.
    'size'          => 18 // Defines the size of captcha characters.
);

To create a captcha image; image-captcha.php

require_once __DIR__ . '/src/Captcha.php';
$config = array(
    'width'         => 180,
    'height'        => 50,
    'length'        => 6
);
$captcha = new \MuhammetSafak\Captcha\Captcha($config);
$captcha->create();

<form method="POST">
    <input type="text" name="your_name" placeholder="Your Name"/><br />
    
    <img src="src/image-captcha.php" id="captcha" /> <br />
    <button onclick="captcha_refresh()">Refresh</button>
    <input type="text" name="areYouBot" placeholder="Captcha" /><br />
    
    <input type="submit" value="Gönder" />
</form>
<script>
    function captcha_refresh()
    {
        img = document.getElementById("captcha");
        img.src = '../src/image-captcha.php';
    }
</script>

A simple validation example is as follows.

require_once __DIR__ . '/src/Captcha.php';
$captcha = new \MuhammetSafak\Captcha\Captcha();
if(isset($_POST)){
    if($captcha->verify($_POST['areYouBot'])){
        // Success
        // ...process
    }else{
        // Error
        echo 'Enter the characters in the picture correctly.';
    }
}