sirin k

"ajaxgii" an AJAX CRUD generator extension for yii.

Sat, 09 Mar 2013 11:27:00 +0530

This is a customized giiplus extension with AJAX CRUD features.
read more here:http://www.yiiframework.com/extension/ajaxgii/

some screenshots:

1.Grid view

2.Create Form

3.Update Form

4.View

i hope this extension will be useful for you.thanks

Sirin k
Nintriva Wireless

Get notified about the status of a Facebook user in your web app using periodic Ajax calls.

Fri, 31 Aug 2012 08:14:00 +0530

hello, This article is helpful only if you have the following situation: A web app which uses facebook login to login its users and if a user is logged out from his/her facebook account through another browser tab, then your app dont know that he is logged out out or not from his facebook account and he/she will remain as logged in your web application.Its ok if you have no problem with this situation.But if you want to forcefully logout the user from your application if he is logged out from his facebook account means you can try this example.This example uses periodic ajax calls to facebook’s graph api to check whether the user is logged in or not.

You can see the source code in my yii wiki section:http://www.yiiframework.com/wiki/376/get-notified-about-the-status-a-of-facebook-user-in-your-web-app-using-periodic-ajax-calls/

Sirin k
Nintriva Wireless

"giiplus" My first Yii extension.

Tue, 19 Jun 2012 10:48:43 +0530

This is a customized bootstrap CRUD generator having just 3 additional features. ie.,

1.pdf export.

2.excel export.

3.print @view.

link:http://www.yiiframework.com/extension/giiplus/

-Sirin

Displaying image in a CGridView column.

Fri, 08 Jun 2012 18:56:00 +0530

This is a simple example of how we can display images in CGridviews.Imagine that you have an image field in your table ie either a location field or a blob type field used to store the images.

To see an exmple code see my wiki article in www.yiiframework.com here:

http://www.yiiframework.com/wiki/331/displaying-image-in-a-cgridview-column/

-Sirin

Storing your images in your table's blob field and displaying that stored images

Fri, 08 Jun 2012 18:53:00 +0530

Here im giving you a very simple example ie how you can store an image to your blob field in a table.Hope you already familiar with the normal image upload.

First im going to tell you the necessary steps you need to carry out to store an image into your blob field.

Let me explain these 7 steps ,

to see an example of 7 steps see my wiki article in www.yiiframework.com here:

http://www.yiiframework.com/wiki/332/storing-your-images-in-your-table-s-blob-field-and-displaying-that-stored-images/

-Sirin

Importing CSV file to mysql table using "LOAD DATA" command.

Fri, 08 Jun 2012 18:44:00 +0530

hi, Here i am giving you some simple step to import huge data from a csv file to your mysql table.this is useful when you have a very huge data to import from csv format.

Imagine that you have a table, tbl_user(id(int AI), name(varchar(100)), age(int), location(varchar(100))). in your db and you have a csv file like this format:Download test format.

to see an example read my wiki article in Yiiframework site:http://www.yiiframework.com/wiki/336/importing-csv-file-to-mysql-table-using-load-data-command/

-Sirin

Don't buy Server space or reseller account from siliconhouse.net in india.

Fri, 01 Jun 2012 16:23:11 +0530

hi guys,

im writing this article since i got lot of bad experience from Siliconhouse.net in india.i took a reseller account of 2000 GB space in linux before 3 months.Im pointing out something i have faced with this team.

They will delete the account you have created for one of your user without your permission.then we again need to submit a ticket make a new password again.i did this 3-4 times already.
They will delete the domain we hosted without our permission.
They will change our account password without our permission.
They will shutdown their service after 10pm everyday.
They wont allow us to run the crone job feature.

So guys be aware of this shit service and dont waste ur time and money with Silicon house.

-Sirin
Nintriva Wireless

Using Twitter bootstrap in Yii framework

Sat, 11 Feb 2012 16:35:00 +0530

We can easily use twitter bootstrap in yii framework.Let give give you an example for twitter popover below:

$assetsDir = dirname(__FILE__).’/../assets’;

$cs = Yii::app()->getClientScript();

$cs->registerCssFile(
Yii::app()->assetManager->

publish($assetsDir.’/css/bootstrap.min.css’)
    );
// Publishing and registering JavaScript file

   $cs->registerScriptFile(
     Yii::app()->assetManager->publish($assetsDir.’/js/bootstrap-twipsy.js’),
     CClientScript::POS_HEAD
     );
   $cs->registerScriptFile(
     Yii::app()->assetManager->publish($assetsDir.’/js/bootstrap-popover.js’),
     CClientScript::POS_HEAD
     );

<script>
            $(function () {
              $(“a[rel=popover]”)
                .popover({
                  html:true ,
                  offset: 10

                })
                .click(function(e) {
                  e.preventDefault()
                })
            })
          </script>

<a href=’#’ rel=’popover’ title=’title’ data-content=’Place content here’ >Click here</a>

Regards,

sirin k

Nintriva Wireless

Starting a php project in Netbeans IDE.

Fri, 10 Feb 2012 19:34:37 +0530

hi,

We can start developing project in Netbeans IDE.

step1:Install Netbeans from the synaptic manager.

step2:go to file select new project.

step3:Select php.

Note:Im writing this article mainly to point out one issue in the start up when i have tried to do a php project using Netbeans IDE.
In this step 3 you are not going to find the PHP option in project categories so that you must need to install the php plugin yourself.
for this go to Tools>plugins>Available plugins and select the extra plugins you need and click install.

Reagards,

sirin k
Nintriva Wireless
India

Start Using MongoDB

Thu, 24 Nov 2011 11:12:00 +0530

You can start using MongoDb within 3 steps.

step1:You can easily install MongoDb from synaptic in linux.
step2:take one terminal and type:mongod (this will start the mongoDB shell)
eg: $ mongod
/usr/lib/mongodb/mongod —help for help and startup options
Thu Nov 24 11:10:43 MongoDB starting : pid=2761 port=27017 dbpath=/data/db/ 64-bit
Thu Nov 24 11:10:43 db version v1.6.3, pdfile version 4.5
Thu Nov 24 11:10:43 git version: nogitversion
Thu Nov 24 11:10:43 sys info: Linux allspice 2.6.24-28-server #1 SMP Wed Aug 18 21:17:51 UTC 2010 x86_64 BOOST_LIB_VERSION=1_42
Thu Nov 24 11:10:43 [initandlisten] *** warning: spider monkey build without utf8 support. consider rebuilding with utf8 support
Thu Nov 24 11:10:43 [initandlisten] waiting for connections on port 27017
Thu Nov 24 11:10:43 [websvr] web admin interface listening on port 28017

step3:take another terminal and type:mongo
eg:$ mongo
MongoDB shell version: 1.6.3
Thu Nov 24 11:11:54 *** warning: spider monkey build without utf8 support. consider rebuilding with utf8 support
connecting to: test
>

On startup the shell connect to the test db in MongoDb server and assigns the database connection to the global variable db.This variable will be the primary access point to the MongoDb through the shell.
Collections can be accessed from the db variable.
eg: db.business will return the business collection in the current database.

Basic Operations with the shell(CRUD)
1.Create
We can insert a document to a collection like below example.

Here we are storing a document to javascript variable ie “user”
> user = {“name” : “sirin k”,
“place” : “palakkad”,
“date” : new Date()}

Now we can insert the javascript variable(ie user) to a collection named

> db.users.insert(user)
done.

Now we can see all the documents in a collection by using,
2.Read

>db.users.find()
{ “_id” : ObjectId(“4ecde1ddb8b201ad4fab9e0b”), “name” : “sirin k”, “place” : “palakkad”, “date” : “Thu Nov 24 2011 11:48:57 GMT+0530 (IST)” }

We can also use fineOne() by passing a criteria through it.

3.Update
Update takes 3 parameter.ie one is the criteria to decide which document to update another is the new document.
suppos if we are going to add another key to store the user friends as an array in one of document we are already stored in users collection.we can do like this,

set a new key frients as array in js variable user.

> user.friends=[]
[ ]

update the document
> db.users.update({“name”:”sirin k”},user)

Read all the document
> db.users.find()
{ “_id” : ObjectId(“4ecde1ddb8b201ad4fab9e0b”), “name” : “sirin k”, “place” : “palakkad”, “date” : “Thu Nov 24 2011 11:48:57 GMT+0530 (IST)”, “friends” : [ ] }

4.Delete
We can remove all the documents in a collection by using remove() like below.
>db.users.remove()
We can also pass a criteria through the remove() function.
>db.users.remove({“name”:”sirin k”})

Regards,
sirin k
Nintriva Wireless
INDIA

MongoDb(noSQL) introduction.

Wed, 23 Nov 2011 15:35:00 +0530

MongoDB is a scalable, high-performance, open source, document-oriented database. Written in C++.
MongoDb is noSQL so here we can call “collections” instead of “tables” and “documents” instead of “table records” in SQL.
#Collection is a group of documents.

#In mongoDb we can represent documents as key value pair as below.

{“message” : “Hello, Welcome to MongoDb”}

#We can also have multiple key value pairs like below

{“message” : “Hello, Welcome to MongoDb”, “foo” : 3}
and
{ “foo” : 3,”message” : Hello, Welcome to MongoDb”}

Note:the above 2 documents are differ since their orders are different.
#MongoDb is case sensitive and type sensitive.

eg1:
{“message” : “Hello, Welcome to MongoDb”} and

{“Message” : “Hello, Welcome to MongoDb”} are different.

eg2:
{“foo” : 3} and
{“foo” :”3”} are different

#Documents in MongoDb shouldn’t contain duplicate entries.

eg3:
{“message” : “Hello, Welcome to MongoDb”}
{“message” : “Hello, Welcome to MongoDb”} is not valid

#Collections in MongoDb is schema free
Collections are not need to worry about any specified schema like in sql table.and it can have
documents in any shape.

eg:

{“Name” : “sirin k”}
{“age” :22}

A single Instance of MongoDb can host several databases which will be completely independent
and each of which can have its own permissions.
Note:Database names should be lower case.

Some reserved db names which shouldn’t use it are,
1.admin(used to store the admin users details)
2.local(used to store any collections that should be local to a single server)
3.config(Used internally to store the info. about the shards)

Regards,

sirin k
Nintriva Wireless
INDIA

Gmap Multiploting and Capturing all marker updates in Yii

Tue, 22 Nov 2011 15:34:00 +0530

This article will be useful for those who are using jquery-gmap extension in Yii.

Here i am going to tell you how you can plot multiple locations in a single google map using this extension and how you can capture all marker locations when a user changing them.This will be useful when you are giving an option to mark multiple locations for a user and save all the updated locations in a single map.

i hope you already familiar with this extension and you are willing to store a single location through this extension.If you are not you can reffer one of my preveous article with this same extension(Google maps in Yii).

So you might have a location model which stores all the location of a business model.So you will be having ONE-TO-MANY relation from business to location model.

Try the below code in your business create form.(_form.php)
<?php

// create a map centered in the middle of the world …
$gmap = new EGmap3Widget();
$gmap->width=’600’;
$gmap->height=’450’;
$gmap->setOptions(array(
        ‘zoom’ => 14,
        ‘center’ => array(0,0),
));

$model=Business::model()->findbyPk(‘3’);

$i=0;

foreach($model->locations as $loc)
{
//Initialize a marker
$m[$i] = new EGmap3Marker(array(
    ‘title’ => $loc->shop_name,
    ‘draggable’=>true,
));
//set location
$m[$i]->latLng=array($loc->latitude,$loc->longitude);

/* add dragend event with an autogenerate js function(ie captureMarkerPosition()) */

$m[$i]->addEvent(‘dragend’, ‘function(result){captureMarkerPosition’.$i.’(result);}’);

//add marker to gmap
$gmap->add($m[$i]);

/* generate hidden input fields to store locations */
echo “
<input type=’hidden’ name=’Location_id[]’ value=’”.$loc->id.”’ >
<input type=’hidden’ name=’Location_latitude[]’ id=’Location_latitude”.$i.”’ value=’”.$loc->latitude.”’>
<input type=’hidden’ name=’Location_longitude[]’ id=’Location_longitude”.$i.”’ value=’”.$loc->longitude.”’>
”;
/*Generate individual functions to capture the marker position */
echo ‘
<script type=”text/javascript”>
function captureMarkerPosition’.$i.’(marker)
{
document.getElementById(“Location_latitude’.$i.’”).value=marker.getPosition().lat();
document.getElementById(“Location_longitude’.$i.’”).value=marker.getPosition().lng();
}
</script>’;

$i++;

}//end loop
?>

Now we want to store all these captured positions when the user press the submit button.We can write a some code in the controller action.
<?php
eg:actionCreatLocation.php

   if(isset($_POST[‘Location_latitude’])&&isset($_POST[‘Location_latitude’]))
                        {

                                  $location[‘id’]=$_POST[‘Location_id’];
                                  $location[‘latitude’]=$_POST[‘Location_latitude’];
                                  $location[‘longitude’]=$_POST[‘Location_longitude’];

                                  $i=0;
                                  foreach($location[‘id’] as $id)
                                  {
                                   $l=Location::model()->findbyPk($id);
                                   $l->latitude=$location[‘latitude’][$i];
                                   $l->longitude =$location[‘longitude’][$i];
                                   $l->save(false);
                                    $i++;
                                  }
                                }
?>

the above code will store the updated marker co-ordinates to Location model.

Regards,

sirin k
Nintriva Wireless
INDIA

Using Jquery dialog box as form in Yii

Sat, 19 Nov 2011 17:43:00 +0530

As you know Jquery UI framework is already bundled with the Yii framework we can use its Dialog box as a widget in Yii.We can use it as a popup form when we are clicking an ajax link.

Just follow 2 steps here.

Step1: view1.php
make an ajaxlink and place an update div inside the jquery dialog box widget as its content in any of your view file.
note:jquery dialog’s autoOpen should be false at this time.

eg:
<?php

echo CHtml::ajaxLink(Yii::t('job','ADD NEW LOCATION'),array('location/create'),array(
        'success'=>'js:function(data){
      $("#jobDialog").dialog("open");
    document.getElementById("add_location").innerHTML=data;
 
}


$this->beginWidget('zii.widgets.jui.CJuiDialog',array(
                'id'=>'jobDialog',
                'options'=>array(
                    'title'=>Yii::t('job','Create Job'),
                    'autoOpen'=>false,
                    'modal'=>'true',
                    'width'=>'auto',
                    'height'=>'auto',
                ),
                ));
 

 echo "<div id='add_location'></div>";


 
 $this->endWidget('zii.widgets.jui.CJuiDialog');
?>


Now we have an ajax link which points to the controller/action ie "location/create" and we have an update div (ie add_location)
to load the ajax response.
Step2:Now we need to update the action ie actionCreate in this example.

public function actionCreate()
	{

             if( Yii::app()->request->isAjaxRequest )
             {
               // Stop jQuery from re-initialization
                Yii::app()->clientScript->scriptMap['jquery.js'] = false;

		$this->renderPartial('create',array(
			'model'=>$model,
		));
             }
            else
             {
              $this->render('create',array(
			'model'=>$model,'deal'=>$deal,
		));

             }

	}

You have done it.Enjoy your jquery dialog form in Yii framework.

Regards,
Sirin k
Nintriva Wireless
INDIA

#SQL performance tip

Sun, 13 Nov 2011 18:21:42 +0530

When we are doing an insert of huge no.of rows into an SQL table ,Normally we will try to write separate insert quries this may lead us to a long duration of execution time and we can increase the speed of executing SQL quries by adding all the rows into a single insert query.

NORMAL CASE:

eg:INSERT INTO tbl_name(field1,field2,…) values(value1,value2,..);
INSERT INTO tbl_name(field1,field2,…) values(value1,value2,..);
INSERT INTO tbl_name(field1,field2,…) values(value1,value2,..);

We can decrease the execution time by adding all these rows into a single INSERT query like below,

eg:INSERT INTO tbl_name(field1,field2,…) values(value1,value2,..),values(value1,value2,..),values(value1,value2,..),….;

This is useful when we are trying to insert about 10k of rows into a table at a time.
For me normally it takes 1min 15 sec to insert 10k of rows but by using this tip it takes only 10 sec to insert 10k of rows.

i have tried this when i did excel and csv import feature.
For excel it took around 20 sec and for csv it took 10 sec of execution time for inseting 10k of rows.

Reagards,

sirin k
Nintriva Wireless
INDIA

Regular expression to support multi-lingual during Yii validation

Mon, 31 Oct 2011 18:32:00 +0530

Sometimes we need to validate the user input to filter special characters except certain commonly used characters lik ,.”: etc.At this time we can write a regular expression in model rules.

eg:

[CODE]

       public function rules()
    {
        // NOTE: you should only define rules for those attributes that
        // will receive user inputs.
        return array(
                        array(‘title,description’, ‘match’, ‘pattern’ => ‘/^[ % $ £ € ¥ . , ” ; : \- a-zA-Z 0-9 \n\r ]+$/u’,’message’ => Yii::t(‘default’, ‘Special characters are not allowed in {attribute}. (allowed list:% $ £ € ¥ . , ” ; : -)’)),

                       );

    }

[/CODE]

In the above example im validating my 2 fields ie title and description with this rule,

/^[ % $ £ € ¥ . , ” ; : \- a-zA-Z0-9 \n\r ]+$/u

here im accepting some commonly used spcecial characters like % $ £ € ¥ . , ” ; : - and enter key or newline by using \n and \r .

One main important thing we need to note in the above example is that it will only accept English letters ie a-zA-Z.So its an exception for other languages like chinese,french,japanese etc.So that reason we are making a smaill change in the validation rule to accept all UTF-8 characters.

/^[ % $ £ € ¥ . , ” ; : \- \p{L} 0-9 \n\r ]+$/u

here we changed a-zA-z with \p{L} this will accept all UTF-8 characters.Finally the rule in Yii model will be like this,

[CODE]

       public function rules()
    {
        // NOTE: you should only define rules for those attributes that
        // will receive user inputs.
        return array(
                        array(‘title,description’, ‘match’, ‘pattern’ => ‘/^[ % $ £ € ¥ . , ” ; : \- \p{L} 0-9 \n\r ]+$/u’,’message’ => Yii::t(‘default’, ‘Special characters are not allowed in {attribute}. (allowed list:% $ £ € ¥ . , ” ; : -)’)),

                       );

    }

[/CODE]

Regards,

sirin k
Nintriva Wireless
INDIA

Session lose for Facebook iframe application only in Internet Explorer .

Mon, 31 Oct 2011 01:02:00 +0530

Facebook iframe app’s session is losing in Internet Explorer when doing a second redirection inside the facebook iframe app.The main reason is ,by default IE wont allow cookies in its priavacy settings If cookies not available means session is also not available for our Facebook iframe app in IE.

solution:

We just need to pass a header like header(‘P3P: CP=”HONK”’); when a browser accessing our page.

In Yii we can set this header at the beginning of evry action or filter.

see the example in Yii,

[CODE]
    public function actionAuthenticate()
    {
          header(‘P3P: CP=”HONK”’);
           /* Declaring facebook object for making facebook api calls */
           $facebook = new Facebook(array(
            ‘appId’ => Yii::app()->controller->module->app_id,
            ‘secret’ => Yii::app()->controller->module->app_secret,
            ‘cookie’ => false,
               ));
[/CODE]

[CODE]

public function filterPermission($filterChain)
{
header(‘P3P: CP=”HONK”’);

[/CODE]

Without this header you are not able to use session when working with IE.

Regards,

sirin k
Nintriva Wireless
INDIA

Print a Portion of a webpage just in 4 steps using JavaScript

Fri, 16 Sep 2011 18:11:00 +0530

step1:
Make a button to print and place a javascript function on the onclick event to print

<input type=’button’ value=’Print’ onclick=’printDiv();’>

step2:
Javascript function to perform printing operation

<script type=”text/javascript”>
function printDiv()
{
window.print();

}
</script>

step3:

Make the whole body hidden except the area need to print
<style type=”text/css” media=”print”>
body {visibility:hidden;}
.printableArea{visibility:visible;}
</style>

step4:
Define the area need to print

<div class=printableArea>
place your Content to print
</div>

Regards,
sirin k
NINTRIVA TECHNOLOGIES
INDIA
www.nintriva.com

Yii's CArrayDataProvider is really awesome but confusing.

Thu, 25 Aug 2011 01:52:18 +0530

Yii ‘s CArrayDataProvider is very helpful to display model relation data’s directly on it.But it is truely a confusing one because by default it will assume a table field named “id” as primary key for its pagination purpose and what if you dont have field named “id” as primary key on your table? so its truely confusing and if you tried to display without an “id” field on ur table you will get an error like “yourmodel.id is not defined”.

To solve this CArrayDataProvider confusing problem you just need to use on of its attribute named “keyField” to specify your primary key field on your table.There is an property named “id” thats just an id of the dataProvider itself.

i have 2 models ie deal and buyer(MANY_MANY).

so $deal->buyers is the relation i used to display my deal buyers.i used a field named “facebook_id” as primary key in model “buyer” .see my code.

$dp = new CArrayDataProvider($deal->buyers, array(
   'keyField' => 'facebook_id',         // PRIMARY KEY
   'id' => 'buyers_list'                    // ID of the data provider itself
));



Regards,
sirin k

NINTRIVA TECHNOLOGIES
INDIA

Facebook DeAuthorize callback URL and its response data.

Mon, 22 Aug 2011 13:58:57 +0530

Facebook Deauthorize callback is used to getting notification to the app owner when a user uninstall our app from their fan page or profile.

We have an option in Facebook’s advanced section of app settings named “Deauthorize Callback“.Here we can specify a URL in ourserver.If we are setting a URL in this section facebook will send a signed request to the specified URL when a user uninstall our app from their fanpage or profile.Facebook providing 2 functions to decode the signed Request and get the encoded data using our app secret key.

Here is what i have done in my callback URL to get the singned request details,

<?php

if(isset($_REQUEST[‘signed_request’]))
{ $data=$this->parse_signed_request($_REQUEST[‘signed_request’],’YOUR_FB_SECRET_KEY’);

}

?>

But whats the problem here is that we cannot identify the structure of decoded array $data.because this process is a hidden call so that we cannot print this using print_r();

so what i have done is that stored it to a file by serializing after that i restored this object by unserialize from that file in my server.

here is the code for that:

$s=serialize($data);
file_put_contents(‘yourfilename’,$s);

The above 2 process is happening at the time of uninstall callback.after this 2 processes i executed one more code to get this from that file and print it out.

if(file_exists(‘yourfilename’))
{
    $s=file_get_contents(‘yourfilename’);
    $data=unserialize($s);

    echo “<pre>”;
    print_r($data);
    echo “</pre>”;
}

Then i got a result like below:

Array
    {
     [algorithm]=>HMAC-SHA256
     [issued_at]=>134534232
     [profile_id]=>324556365474
     [user]=>Array(
                        [country]=>in
                        [locale]=>en_US

                        )
    [user_id]=>0

    }
Here i got the fan page id as profile_id from this array .that is the fan page id which is uninstalled my app if it is a user profile the we will get the user facebook id in “user_id” from this array.

here is that 2 functions from facebook:

function parse_signed_request($signed_request, $secret) {
list($encoded_sig, $payload) = explode(‘.’, $signed_request, 2);

// decode the data
$sig = $this->base64_url_decode($encoded_sig);
$data = json_decode($this->base64_url_decode($payload), true);

if (strtoupper($data[‘algorithm’]) !== ‘HMAC-SHA256’) {
    error_log(‘Unknown algorithm. Expected HMAC-SHA256’);
    return null;
}

// check sig
$expected_sig = hash_hmac(‘sha256’, $payload, $secret, $raw = true);
if ($sig !== $expected_sig) {
    error_log(‘Bad Signed JSON signature!’);
    return null;
}

return $data;
}

public function base64_url_decode($input)
{
return base64_decode(strtr($input, ‘-_’, ‘+/’));
}

By using this function you can decode that signed request and get the id of the uninstalled fan page or profile id.

Regards,

sirin k
NINTRIVA TECHNOLOGIES
INDIA

Datetime comparing when validating a Yii form

Thu, 11 Aug 2011 11:05:00 +0530

hi guys,

i have two fields in my table 1.start_time,2.end_time.im using a jquiry datetime picker for datetime input,so here i just want to make sure that the end_time should be greater than the start time.

To accomplish this we just need to place a simple validation rule in Yii model class like the following example:

public function rules()

{

return array( array(‘end_time’,’compare’,’compareAttribute’=>’start_time’,’operator’=>’>’,’on’=>’insert’,’message’=>’Ending time should be greater than starting time’),

);

}

Regards,

sirin k

NINTRIVA TECHNOLOGIES
INDIA