Webapps without the web
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![Figure : 2 [ Application Flow of CodeIgniter]](https://image.slidesharecdn.com/codegnitorppt-141205014250-conversion-gate02/75/codegnitorppt-6-2048.jpg?cb=1672199887)
![DATABASE CONFIGURATION
Open application/config/database.php
$config['hostname'] = "localhost";
$config['username'] = "r...](https://image.slidesharecdn.com/codegnitorppt-141205014250-conversion-gate02/75/codegnitorppt-15-2048.jpg?cb=1672199887)
![CONFIGURATION
Then open application/config/config.php
$config['base_url'] = 'http://localhost/ci_user';
Open applicatio...](https://image.slidesharecdn.com/codegnitorppt-141205014250-conversion-gate02/75/codegnitorppt-16-2048.jpg?cb=1672199887)
![SESSION STARTING
<?php
Session start();
$_session['id']=$id;
$_session['username']=$username;
$_session['login true']...](https://image.slidesharecdn.com/codegnitorppt-141205014250-conversion-gate02/75/codegnitorppt-21-2048.jpg?cb=1672199887)
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Codegnitorppt
- 1. Submitted By Reshma vijayan .R
- 2. Introduction Why Framework not Scratch? MVC ( Model View Controller) Architecture What is CodeIgniter ???? Application Flow of CodeIgniter CodeIgniter URL Controllers Views Models CRUD operations Session starting Form validation Q/A Reference
- 3. Key Factors of a Development Interface Design Business Logic Database Manipulation Advantage of Framework Provide Solutions to Common problems Abstract Levels of functionality Make Rapid Development Easier Disadvantage of Scratch Development Make your own Abstract Layer Solve Common Problems Yourself The more Typing Speed the more faster
- 4. Separates User Interface From Business Logic Model - Encapsulates core application data and functionality Business Logic. View - obtains data from the model and presents it to the user. Controller - receives and translates input to requests on the model or the view Figure : 01
- 5. An Open Source Web Application Framework Nearly Zero Configuration MVC ( Model View Controller ) Architecture Multiple DB (Database) support Caching Modules Validation Rich Sets of Libraries for Commonly Needed Tasks Has a Clear, Thorough documentation
- 6. Figure : 2 [ Application Flow of CodeIgniter]
- 7. URL in CodeIgniter is Segment Based. www.your-site.com/news/article/my_article Segments in a URI www.your-site.com/class/function/ID CodeIgniter Optionally Supports Query String URL www.your-site.com/index.php?c=news&m=article&ID=345
- 8. A Class file resides under “application/controllers” www.your-site.com/index.php/first <?php class First extends CI_Controller{ function First() { parent::Controller(); } function index() { echo “<h1> Hello CUET !! </h1> “; } } ?> // Output Will be “Hello CUET!!” • Note: • Class names must start with an Uppercase Letter. • In case of “constructor” you must use “parent::Controller();”
- 9. In This Particular Code www.your-site.com/index.php/first/bdosdn/world <?php class First extends Controller{ function index() { echo “<h1> Hello CUET !! </h1> “; } function bdosdn( $location ) { echo “<h2> Hello $location !! </h2>”; } } ?> // Output Will be “Hello world !!” • Note: • The ‘Index’ Function always loads by default. Unless there is a second segment in the URL
- 10. A Webpage or A page Fragment Should be placed under “application/views” Never Called Directly 10 web_root/myci/system/application/views/myview.php <html> <title> My First CodeIgniter Project</title> <body> <h1> Welcome ALL … To My .. ::: First Project ::: . . . </h1> </body> </html>
- 11. Calling a VIEW from Controller $this->load->view(‘myview’); Data Passing to a VIEW from Controller function index() { $var = array( ‘full_name’ => ‘Amzad Hossain’, ‘email’ => ‘tohi1000@yahoo.com’ ); $this->load->view(‘myview’, $var); } <html> <title> ..::Personal Info::.. </title> <body> Full Name : <?php echo $full_name;?> <br /> E-mail : <?=email;?> <br /> </body> </html>
- 12. Designed to work with Information of Database Models Should be placed Under “application/models/” <?php class Mymodel extend Model{ function Mymodel() { parent::Model(); } function get_info() { $query = $this->db->get(‘name’, 10); /*Using ActiveRecord*/ return $query->result(); } } ?> Loading a Model inside a Controller $this->load->model(‘mymodel’); $data = $this->mymodel->get_info();
- 13. CRUD OPERATIONS IN MVC ➢Create ➢Read ➢Update ➢Delete
- 14. DATABASE CREATION //Create CREATE TABLE `user` ( `id` INT( 50 ) NOT NULL AUTO_INCREMENT , `username` VARCHAR( 50 ) NOT NULL , `email` VARCHAR( 100 ) NOT NULL , `password` VARCHAR( 255 ) NOT NULL , PRIMARY KEY ( `id` ) )
- 15. DATABASE CONFIGURATION Open application/config/database.php $config['hostname'] = "localhost"; $config['username'] = "root"; $config['password'] = ""; $config['database'] = "mydatabase"; $config['dbdriver'] = "mysql";
- 16. CONFIGURATION Then open application/config/config.php $config['base_url'] = 'http://localhost/ci_user'; Open application/config/autoload.php $autoload['libraries'] = array('session','database'); $autoload['helper'] = array('url','form'); Open application/config/routes.php, change default controller to user controller
- 17. Creating our view page Create a blank document in the views file (application -> views) and name it Registration.php /Login.php Using HTML and CSS create a simple registration form
- 18. public function add_user() { $data=array ( 'FirstName' => $this->input- >post('firstname'), 'LastName'=>$this->input- >post('lastname'), 'Gender'=>$this->input->post('gender'), 'UserName'=>$this->input- >post('username'), 'EmailId'=>$this->input->post('email'), 'Password'=>$this->input- >post('password')); $this->db->insert('user',$data); }
- 19. //select public function doLogin($username, $password) { $q = "SELECT * FROM representative WHERE UserName= '$username' AND Password = '$password'"; $query = $this->db->query($q); if($query->num_rows()>0) { foreach($query->result() as $rows) { //add all data to session $newdata = array('user_id' => $rows- >Id,'username' => $rows->UserName,'email' => $rows- >EmailId,'logged_in' => TRUE); } $this->session->set_userdata($newdata); return true; } return false; }
- 20. //Update $this->load->db(); $this->db->update('tablename',$data); $this->db->where('id',$id); //delete $this->load->db(); $this->db->delete('tablename',$data); $this->db->where('id',$id);
- 21. SESSION STARTING <?php Session start(); $_session['id']=$id; $_session['username']=$username; $_session['login true']='valid'; if($-session['login true']=='valid') { $this->load->view('profile.php'); } else { $this->load->view('login.php'); }
- 22. FORM VALIDATION public function registration() { $this->load->library('form_validation'); // field name, error message, validation rules $this->form_validation->set_rules('firstname', 'First Name', 'trim|required|min_length[3]|xss_clean'); $this->form_validation->set_rules('lastname', 'Last Name', 'trim|required|min_length[1]|xss_clean'); $this->form_validation->set_rules('username', 'User Name','trim|required|min_length[4]|xss_clean| is_unique[user.UserName]'); }
- 23. if($this->form_validation->run() == FALSE) { $this->load->view('Register_form'); } else { $this->load->model('db_model'); $this->db_model->add_user(); }
- 24. USEFUL LINKS www.codeigniter.com
- 25. User Guide of CodeIgniter Wikipedia Slideshare
- 26. THANK YOU
