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+--- Thread: Simple captcha (/showthread.php?tid=27708)
Simple captcha - El Forum - 02-18-2010
[eluser]MaD HamsteR[/eluser]
Description
This is simple captcha validation library, based on sessions, no DB required. It can be used as stand alone class as well, CI isn't necessary.
Requirements
GD
Sessions
Demo & download
http://dc.alfaspace.net/captcha
Note
This captcha uses SESSIONS, so before using it ensure that user has browser cookies on!
Config
You can configure paths, fonts, and backgrounds and more in captcha/captcha.php
CodeIgniter users DON'T FORGET TO CHANGE FONTS FOLDER & BGS PATHS!
You can also confiruge captcha at runtime.
Use GIF for backgrounds.
Example usage in CI
Code:
<?php
class Welcome extends Controller {
/**
* Load simple captcha library
*/
function Welcome()
{
parent::Controller();
$this->load->library('captcha/captcha');
}
/**
* Show form
*/
function index()
{
$this->load->view('index');
}
/**
* Use this method to output captcha image.
* Ex. img src="index.php/welcome/captcha"
*/
function captcha()
{
$this->captcha->generate();
}
/**
* Use this method in form action url, ex. action="index.php/welcome/validate"
*/
function validate()
{
//Validate user input
if($this->captcha->validate($this->input->post('captcha')))
{
echo 'OK'; //If captcha string is correct
}else{
header('Location: /index.php/welcome'); //Otherwise redirect back
}
}
}
/* End of file welcome.php */
/* Location: ./system/application/controllers/welcome.php */The idea
When we show captcha image on page like
Code:
<img src="index.php/welcome/captcha">