Using Session in CI

Using  Session:

For using Session in CI must have to add this following line:

$this->load->library( ’session’ );

Important Note: If you have to use session for different pages, in that case u have to write this same line each and every time. So, better not to use this line, but play with the CONFIG folder.

• go to the location “http://localhost/PROJECT_FOLDER/system/application/config/“
• open the file “autoload.php”
• than rewrite the variable $autoload['libraries'] =  array( ‘session‘);

After than should have to assign session value like array:

[array]

( ’session_id’    => random hash,

‘ip_address’    => ’string – user IP address’,

‘user_agent’    => ’string – user agent data’,

‘last_activity’ => timestamp )

Retrieving  data from session:

$session_id = $this->session->userdata( ’session_id’ );

Adding Custom Session Data:

$this->session->set_userdata( $array );

Where $array is an associative array containing your new data. Here’s an example:

$sessionArry= array(

‘username’  => ‘Lizee’,

‘email’     => ‘lizee@mysite.com’,

‘logged_in’ => TRUE,

‘usertype’ => ’superAdmin’,

);

$this->session->set_userdata( $sessionArry );

userdata , set_userdata are the library function. So, never and every change those.

Starting Codeigniter

Codeigniter (CI ), name of PHP Framework. 1year  ago I was willing to start working on it. I search on net, read some books. but, still i was confused, how to do what! And i did nothing. by this time, i got a professional work which have to develop with CI. So, i was bound to learn it. Now, i am confident on CI. Those who are willing to start learning CI, but don’t know from where to start.  I hope this post will be help those learners to start up.

At first you have to install and configure. for that please visit:

http://codeigniter.com/user_guide/installation/index.html

Before starting CI, its very important to know, how CI is designed. There we go:

Codeigniter is MCV patter framework.

• M-MODEL (All kind of query related code will be here)
• V-VIEW (All kiind of htlm code will be place here)
• C-CONTROLLER (This is the BOSS, who control the whole system)

Now, we will create a very simple page. Lets create a registration form, where any User will input their information.  For that what we have to follow some steps:

1. Create a View file which will display the Registration form.
2. Create a Controller file, which will call the Registration page and collect the data
3. Create Model,which will save all data on database.

to be continued…

CodeIgniter image upload

When I first time try to write code for image upload on Codeigniter, I had to face problems. I dig and dig and dig. I search on CI guide. but, thats not enough to help me. Well, finally I did it.  If someone stuck on CI image upload, hope it will help them a lot.

There are some easy steps to upload image on CI :

• Create the form normally how it should create for upload a photo on php.  Must add “enctype=”multipart/form-data”
• open controler file. under the upload image function write down following code :

$config[ 'upload_path' ] =  ‘./uploads/’ ;  // destination folder path

$config[ 'allowed_types' ]  =  ‘gif|jpg|png’ ; // Allowed uploaded file type

$config[ 'max_size' ]    =  ‘2048′ ;// Allowed uploaded file’s max size

$this->load->helper( array(  ‘form’ ,  ‘url’ ) ) ;

$this->load->library( ‘upload’ ,  $config);

$image_up = $this->upload->do_upload(‘image‘);

$image_data =  array(‘upload_data’ => $this->upload->data());

• $image_up is where image upload information will be safe, it will return 1 if image uploaded successfully.
• $config is very important variable. for details of  “$config” variable’s parameters  you must have to see the manual
• $image_data will carry the uploaded image information.
• BLUE marked words are library function.
• image is form name