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captcha component for version 2.x

Captcha Component & Helper for cakePHP2.x

Captcha Component & Helper for cakePHP2.x :

captcha’s are very essential to protecting your web forms and all that spam.this captcha component and captcha helper used to render captcha images in your cakephp websites.This captcha component and helper for cakePHP will Provide you  captcha’s very similar to the Google, or you can say it will produce google like captcha images in your cake 2.x website.

This captcha component and helper comes with lot of customization options.you can configure it the way you like.it is very easy to implement too rather than other tricky captcha components .things are quite simple in this captcha component with helper.we’ll discuss all customization options here

if you are using cakephp 1.3 see this post:>>

cakephp captcha component for cakePHP 1.3

Captcha Component and Helper for cake 2.x Demo And Download :

Live demo and Download captcha component and Helper.

Captcha Component For cake2 Demo Captcha Component For cake2 Download

Captcha Component & Helper for cakePHP2.x : Implementation Guide

so Lets move to implementation Guide of the cakephp captcha component for version 2.0 or above.Firstly we gonna look at file hierarchy.

Captcha Component for cake 2.x – Required files Hierarchy

Below is the Hierarchy of the Required Files and Folders.The FIles and Folders with red color are the cakePHP captcha Component FIles.You just simply need to Download these From the Link Above or Below this Post and put exactly according to this hierarchy.Although I have made an hierarchy of Folders in the download So you’ll easily understand where to place what.

/App         <-The App folder of your cake project

  • controllers
    • components
      • CaptchaComponent.php  <- The captcha Component File
  • views
    • helpers
      • CaptchaHelper.php  <- The Captcha Helper File
  • webroot
    • cakecaptcha   <- Resource Folder of Captcha Component contains fonts & word files.

I hope you understand this hierarchy very well and get where to place what.this will produce google like captcha in cakephp.Let move further and see Usage guide of captcha component for cakephp 2.0 or above.

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Usage of captcha component for cakephp 2.0 or above

So now lets move on and see how we include captcha component for cakphp 2.0 or above.so firstly download all the files and put them in hierarchy as shown above.Now we move to our first step.

Step 1. Include the captcha component and helper in our controller

So the First Step is to Include the captcha component and helper in our controller where we wana use them.

Step 2 : Create Method/Action Named captcha in your controller -

The 2nd step is to write a method/action named caption in same controller where we wana use the captcha component and helper.See the captcha function with code just copy it.

step 3 : Rendering captcha for cake 2.0 or above in the view -

The Next Step to render the captcha in the view file so that we get captcha image in our forms .To do so we write the following code in view file .Say we are going to render the captcha in register.ctp view of the users controller action named register .

Eg say File :register.ctp

The above code will just render the captcha in the view but not validate it so lets go ahead and validate it.

step 4 : validating correct/incorrect captcha code in cake 2.0 -

Now we have just rendered the captcha,So when user inputs the data along with captcha code the code must be validated so for that we have a simple check function called validateCaptcha for the POST requests and validateGetCaptcha For the Get requests.Usually we use POST forms in cakePHP. Lets say we rendered captcha in register.ctp of the users controllers register action then to validate the captcha we will write the following code in the register action of the users controller.

Eg. Say Function register() -

For the GET Requests -

IF you are using GET method instead of Default Post method in cake. Here  the code going to be.

Eg. Say Function register() -

Thats It! Those are all Steps ,Quite easy .I hope by now your cakePHP captcha component is working fine.But Hey This is not all .You can customize it way you want . SO Lets move to some advanced customization Section .

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Captcha Component For cakePHP 2.0 – Advanced Customization’s

Now lets see some advaced customization’s for the captcha component and helper for 2.x.there are lot of customization options like changing background color,foreground color,add new colors changing height and widh of rendered image.you can even control quality,blur and image format.you can also provide mas word length for captcha image.

cakePHP captcha : Sorting Common Issues -

While Implementing the captcha component i figured that there is a common issue of path .Like if we try the captcha component on localhost and server the path problem occurs and result is broken.So i Write an customization option for that called “pathType”.
ON my windows Localhost I set pathType=2 and on server there is no need for that option or you can say by default we use pathType=1 which works fine on linux/unix servers.
Here is a Quick fix .Change path type to 1 to 2 or vice versa if captcha doesn’t render .

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Captcha component for cakePHP 2.x – Sreenshots :

Captcha Component and Helper for cake 2.x Demo And Download :

Live demo and Download captcha component and Helper.

Captcha Component For cake2 Demo Captcha Component For cake2 Download

 

Conclusion :

I hope You liked this captcha component that produces very similar captcha Like Google captcha in cakePHP.Hope this will help you in your cakePHP projects.Please keep visiting if you liked this post .

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5 Replies

  1. Rajeev says:

    Hi Ramandeep,

    I tried integrating the code with my CakePHP 2.0 site but its throwing this error in the view (register.ctp):

    Notice (8): Undefined index: captchaerror [APP\View\Helper\CaptchaHelper.php, line 25]
    Code Context

    CaptchaHelper::__construct() – APP\View\Helper\CaptchaHelper.php, line 25
    HelperCollection::load() – CORE\Cake\View\HelperCollection.php, line 88
    View::loadHelpers() – CORE\Cake\View\View.php, line 850
    View::render() – CORE\Cake\View\View.php, line 456
    Controller::render() – CORE\Cake\Controller\Controller.php, line 959
    Dispatcher::_invoke() – CORE\Cake\Routing\Dispatcher.php, line 110
    Dispatcher::dispatch() – CORE\Cake\Routing\Dispatcher.php, line 85
    [main] – APP\webroot\index.php, line 96

    Also, its not showing any captcha image though I did set ‘pathType’=>2. I tested the code on the by uploading the code on live site in the Linux server but ended up with same problem so had to roll it back.

    When I commented line 25 ($this->captchaerror=$view->viewVars['captchaerror']) in CaptchaHelper.php, the error message disappeared but still Captcha image was not getting displayed.

    Can you please advise what do I need to do to fix this problem?

    Thanks in advance
    Rajeev

  2. Juan says:

    I have the same problem, can oyu help me? How can I fix this error? Notice (8): Undefined index: captchaerror [APP\View\Helper\CaptchaHelper.php, line 25]

  3. Algis says:

    I have got the same problem. Just comment or delete this line. It seems to be unnecessary.

  4. I have the same problem Undefined index: captchaerror [APP\View\Helper\CaptchaHelper.php, line 25]

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