PHP Captcha Library

What is it

A library implemented by PHP to generate captcha easily.

Requirements

• PHP 5 +
• PHP GD
• composer

Please assure that you have installed php-gd, and install it via apt install php7.0-gd or apt install php5-gd is recommended.

Installation

Here are two ways to install:

• Using composer:

  composer require php-quickorm/captcha
  

• or download the Captcha.php and arial.ttf to your project and import it by require "Captcha.php";

Usage

The captcha has three levels, and the first is the easiest.

Simple

image.php

$captcha = new Captcha();
$_SESSION['code'] = $captcha->getCode();
$captcha->render();

index.html

<img src="image.php">

Advanced Options

// The Captcha has three levels, and the first is the easiest.
$level = 3; 
// Case Sensitive
$caseSensitive = false;


$captcha = new Captcha($level, $caseSensitive);

// Get the code
$code = $captcha->getCode();

// Get the php-gd image resource
$im = $captcha->getImageResource();

// Check the code if correct
$captcha->check("AbcD");

// Send HTTP response as a image
$captcha->render();

Here is a demo: https://github.com/php-quickorm/Captcha/tree/master/demo