Irmantas PHP, Zend Framework programming

Protect your email address from spam bots using jQuery

2009-10-20T22:33:00.000-07:00

It is very useful to leave email address for your site visitors but damn spam bots finds them, and we get only not useful spam emails. But there is good way to protect your email address from spam bots using jQuery.

First step where you want to display your email add with class "myemail" (you can change this) like this:

Now in html head, add script witch would append this span with your email address, witch is exploded in your javascript variables:


$(function(){
 var _em_o = 'my';
 var _em_t = 'sec';
 var _em_th = 'ret';
 var _em_f = '@';
 var _em_fi = 'ema';
 var _em_s = 'il.';
 var _em_se = 'com';
 var anchor = $('');
 anchor.attr('href', 'ma'+'il'+'to:'+_em_o+_em_t+_em_th+_em_f+_em_fi+_em_s+_em_se);
 anchor.text(_em_o+_em_t+_em_th+_em_f+_em_fi+_em_s+_em_se);
 $('.myemail').append(anchor);
});

In additional you can use some kind of encoding to completely hide your email from damn spam bots.

Secure your forms with Zend_Captcha captcha Part 2 reCaptcha

2009-10-01T11:40:00.000-07:00

In last post I wrote that I would show you how to use reCaptcha service with your Zend Framework application. To use reCaptcha service you need service public key and private key. To get keys go to reCaptcha website and hit "Use reCAPTCHA on your site" red button on the bottom of the page and signup for free account. After sign up login to your reCaptcha account and create new reCaptcha key simply writing your website address. After creating new key you shoud get private and public keys.

To use reCaptcha with your Zend Framework put reCaptcha keys in config file or difine as constants in your bootsrap file like I did.


define('RECAPTCHA_PRIVATE_KEY', 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx');
define('RECAPTCHA_PUBLIC_KEY', 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx');

Now in you form class create reCaptcha service object and add some options to it:


//crate service object
$recaptcha = new Zend_Service_ReCaptcha(RECAPTCHA_PUBLIC_KEY, RECAPTCHA_PRIVATE_KEY);
//adding option, setting recaptcha theme to clean
$recaptcha->setOption('theme', 'clean');
//crate captcha object
$captcha = new Zend_Captcha_ReCaptcha();
$captcha->setService($recaptcha);

//finaly create captcha options and create form element
$capOptions = array(
 'captcha'        => $captcha,
);
$this->captcha = new Zend_Form_Element_Captcha('captcha', $capOptions);

To check if user submited valid capthca use following code:


$recaptcha = new Zend_Service_ReCaptcha(RECAPTCHA_PUBLIC_KEY, RECAPTCHA_PRIVATE_KEY);
$recaptchaResult = $recaptcha->verify(
 $this->_request->getParam('recaptcha_challenge_field'),
 $this->_request->getParam('recaptcha_response_field')
);
$postData = $this->_request->getPost();
if ($this->form->isValid($postData) && $recaptchaResult)
{
        //save your post data
}

Thats it. If you have any questions aks them in comments.

Secure your forms with Zend_Captcha captcha

2009-09-30T11:40:00.000-07:00

While I'm working with my small project I'm testing various Zend Framework libraries. Today I would show how you can add captcha to your site using Zend_Captcha_Image. In next part of this post I would show how to implement reCAPTCHA with Zend_Captcha.

I have a form class with variuos fields, to secure this class I would use Zend_Captcha_Image library. First should be created Zend_Captcha_Image object and set to it some parameters:


class Form_MyForm extends Zend_Form
{
 public function init ()
 {
 //other form elements
 // ....
  
 //Captcha element
 $captcha = new Zend_Captcha_Image();
 //add font for your captcha
 $captcha->setFont('../../public_html/images/fonts/font'.rand(1, 14).'.ttf');
 //add image dir where your temproary captcha would be stored
 $captcha->setImgDir('../../public_html/images/captcha/');
 $captcha->setWordlen(5); //captvha word length
       $captcha->setDotNoiseLevel(0); //set image noise level
       $captcha->setLineNoiseLevel(2); //set image line noise level
 
 //set captcha options for form element
 $capOptions = array(
  'captcha'        => $captcha,
  'captchaOptions' => array('captcha' => 'Image')
 );

 //create form element
 $this->captcha = new Zend_Form_Element_Captcha('captcha', $capOptions);
 $this->captcha->setLabel('Security Code');
 }
}

Here is detailed steps of creating captcha:
1. Create instance of Zend_Captcha_Image
2. Set font. You can add multiple fonts and randomize them how is shown in my snippet for even more secure form.
3. Set destination where temporary generated images should be stored.
4. Set captcha code word length 5-8 I think is best.
5. Set captcha image dot noise level in my example it is turned off.
6. Set captcha image line noise level in my example it set to 2.
7. Create array of options for Zend form element object.
8. Finaly create Zend_Form_Element_Captcha object like regular form element.

Zend_Form multiple file uploads

2009-08-18T14:00:00.000-07:00

This blog I'm starting with this mini tutorial. Recently I have started using Zend Framework as my main PHP framework. Testing it and playing with different components I decided to create something useful. I created simple form where users could upload more than one file, I started googling how to achieve this. Found some nice tutorials but they did not suited for my needs.
After some time of experiments I ended with this code.

In form class i created files fields by adding these lines of code in my class:


//image upload field1
$this->files = new Zend_Form_Element_File('files');
$this->files->setLabel('Select files to upload')
->setMultiFile(3)
->addValidator(new Zend_Validate_File_IsImage)
->addValidator(new Zend_Validate_File_Size('2MB'))
->addValidator('Count', 3);

With method setMultiFile() I added 3 file fields in my form. Next step is to check in controller if is post and if everything is valid. You can do this with standart isValid() form method. Next to get files and rename them in static or even dynamic directory you should not access data with form method getValues, if you do this all your uploaded files would be LOST.

Upload precess is quite simple here is example how you can upload rename files and place them in dynamic directory:


view->form = new Form_NewItem('Submit');
 $request = $this->getRequest();

 //check if is post data
 if ($request->isPost())
 {
  //get data and check if data is valid
  $data = $request->getPost();
  if ($form->isValid($data))
  {
   //get data from submited form
   $name = $form->getValue('name');
   $text = $form->getValue('title');
  
   //load model where data would be saved
   $itemModel = new Model_Db_Item;
  
   $insertData = array
   (
    'name' => $this->getUserId(),
    'text' => $webTitle,
   );
  
   //save data and get unique id
   $itemId = $itemModel->insert($insertData);
  
   //check if data is saved
   if ($itemId)
   {
    //take transfer from form element
    $adapter = $form->files->getTransferAdapter();
    //APP_PUBLIC is set to my www public directory
    $destination = APP_PUBLIC . '/uploads/'.(int)($itemId/100).'/'.(int)($itemId%100).'/';
    //create directory where files would be hold
    if (!file_exists($destination))
     mkdir($destination, 0777, 1);
   
    $i=0;
    //loop uploaded files
    foreach ($adapter->getFileInfo() as $info)
    {     
     //rename file how you like and move it to given destination
     $fileName = 'original_'.$i.'.jpg';
     $adapter->addFilter('Rename', array('target'=>$destination.$fileName, 'overwrite'=>true));
    
     //if something goes wrong print errors in screen
     if (!$adapter->receive($info['name']))
     {
      die(print_r($adapter->getMessages(),1));
     }
    
     $i++;
    }
   }
  }
 }
}
}

Thats it you can now upload multiple files in dynamic created directories. If you have any questions, do not be shy leave them in comments.