Posts Tagged ‘captcha
May07Simple captcha component for CakePHP (New)
Updated on – December 23, 2011
Follow these simple steps to make it working. (I assume that someone trying it has proficient knowledge of CakePHP framework. I may or may not help in problems which are related to knowledge of CakePHP rather than component itself).
Copy attached font file (monofont) to ‘webroot’ folder.
Copy component file (captcha.php) to app/controllers/components
Create a function similar to the following in your controller. (NOTE: I have used “signups” controller for demonstration purpose only. You should change controller name accordingly.)
function captcha() {
$this->autoRender = false;
$this->layout='ajax';
if(!isset($this->Captcha)) { //if Component was not loaded throug $components array()
App::import('Component','Captcha'); //load it
$this->Captcha = new CaptchaComponent(); //make instance
$this->Captcha->startup($this); //and do some manual calling
}
//$width = isset($_GET['width']) ? $_GET['width'] : '120';
//$height = isset($_GET['height']) ? $_GET['height'] : '40';
//$characters = isset($_GET['characters']) && $_GET['characters'] > 1 ? $_GET['characters'] : '6';
//$this->Captcha->create($width, $height, $characters); //options, default are 120, 40, 6.
$this->Captcha->create();
}
Call the captcha action from within your img tag in the view file as below:
echo $form->create("Signups");
echo $html->image($html->url(array('controller'=>'signups', 'action'=>'captcha'), true),array('style'=>'','vspace'=>2)); ?>
echo 'Enter the given security code:';
echo $form->input('Signup.captcha',array('autocomplete'=>'off','label'=>false,'class'=>'','error'=>__('Failed validating code',true)));
echo $form->submit(__(' Submit ',true));
echo $form->end();
And you are done! The captcha image should look like 
Also, you can re-generate the captcha by adding (replacing code in line 2 of the above) ajax code something similar to the following:
<div id="captchaID" ><?php
echo $html->image($html->url(array('controller'=>'signups', 'action'=>'captcha'), true),array('style'=>'','vspace'=>2)); ?></div>
<?php echo $ajax->link('Can not read this code? Reload.','regenerate code',array('url'=>'reload_captcha','update'=>'captchaID')); ?>
In the code above it calls a reload_captcha function of the current controller. You can place reload_captcha in current controller or preferrably in the app_controller to make it available universally. Here’s the code:
function reload_captcha() {
App::import('Component','Captcha'); //load it
$this->Captcha = new CaptchaComponent(); //make instance
$this->Captcha->startup($this); //and do some manually calling
$this->layout='ajax';
Configure::write('debug',0);
$this->viewPath = 'elements'.DS;
$this->render('reload_captcha');
}
Obviousaly it renders a reload_captcha element. So create a reload_captcha.ctp file and place it in views/elements with the following code in it:
<?php echo $html->image($html->url(array('controller'=>'signups', 'action'=>'captcha'), true),array('style'=>'','vspace'=>2)); ?>
There is model validation code included in the files with example of how to validate it. Files include a model with new validation entry along with two function.
You can see it in working here. Let me know if you discover any issue while implementing it. Your suggestions to improve it are always welcome.
Mar06Simple captcha component for CakePHP
This post is deprecated. Please check this post instead.
Captcha is the basic necessity in today’s data submission processes where numerous spammers are looking for space to occupy with their promos.
There are number of captcha component online and i have created this one to suit my cakephp needs by modifying one simple yet powerful captcha script. Click to continue »
Mar05TinyMce and Captcha collide in my cakephp application
I was struck in a very strange problem today. I was using captcha component to create and set a captcha session and image for view section. Next is the snippet of create function which i used to load component. I will be pasting JcaptchaComponent source code at the end for anyone who may want to take a look into the matter more precisely (however i feel the componet itself should be quite innocent) Click to continue »
