introduction to codeigniter (refreshaugusta, 20 may 2009)

CodeIgniterIntroduction to

20 May 2009

What is CodeIgniter?

Open Source PHP Framework

<?php $this->load->view(‘about’);

What is CodeIgniter?

Open Source PHP Framework Free (as in beer / as in rights)

<?php $this->load->view(‘about’);

What is CodeIgniter?

Open Source PHP Framework Free (as in beer / as in rights) The “guts” of ExpressionEngine 2

<?php $this->load->view(‘about’);

What is CodeIgniter?

Open Source PHP Framework Free (as in beer / as in rights) The “guts” of ExpressionEngine 2 Backed by bootstrapped company

<?php $this->load->view(‘about’);

History of CodeIgniter

‘01: Rick Ellis develops pMachine

<?php $this->load->model(‘event’); $data[‘events’] = $this->event->get_all(); $this->load->view(‘history’, $data);

History of CodeIgniter

‘01: Rick Ellis develops pMachine ‘02: pMachine publicly released

<?php $this->load->model(‘event’); $data[‘events’] = $this->event->get_all(); $this->load->view(‘history’, $data);

History of CodeIgniter

‘01: Rick Ellis develops pMachine ‘02: pMachine publicly released ‘04: ExpressionEngine released

<?php $this->load->model(‘event’); $data[‘events’] = $this->event->get_all(); $this->load->view(‘history’, $data);

History of CodeIgniter

‘01: Rick Ellis develops pMachine ‘02: pMachine publicly released ‘04: ExpressionEngine released ‘06: CodeIgniter released

<?php $this->load->model(‘event’); $data[‘events’] = $this->event->get_all(); $this->load->view(‘history’, $data);

History of CodeIgniter

‘01: Rick Ellis develops pMachine ‘02: pMachine publicly released ‘04: ExpressionEngine released ‘06: CodeIgniter released ’08: ExpressionEngine 2 demoed at SXSW

<?php $this->load->model(‘event’); $data[‘events’] = $this->event->get_all(); $this->load->view(‘history’, $data);

CodeIgniter Key Features

Small footprint

<?php $this->load->model(‘feature’); $data[‘features’] = $this->feature->get_all(); $this->load->view(‘features’, $data);

2.9x

10.5x

CodeIgniter Key Features

Small footprint PHP 4 compatible

<?php $this->load->model(‘feature’); $data[‘features’] = $this->feature->get_all(); $this->load->view(‘features’, $data);

CodeIgniter Key Features

Small footprint PHP 4 compatible Database abstraction layer

<?php $this->load->model(‘feature’); $data[‘features’] = $this->feature->get_all(); $this->load->view(‘features’, $data);

CodeIgniter Key Features

Small footprint PHP 4 compatible Database abstraction layer Global XSS filtering

<?php $this->load->model(‘feature’); $data[‘features’] = $this->feature->get_all(); $this->load->view(‘features’, $data);

CodeIgniter Key Features

Small footprint PHP 4 compatible Database abstraction layer Global XSS filtering SEO friendly URLs

<?php $this->load->model(‘feature’); $data[‘features’] = $this->feature->get_all(); $this->load->view(‘features’, $data);

example.com/controller/method/var1/var2

CodeIgniter Key Features

Small footprint PHP 4 compatible Database abstraction layer Global XSS filtering SEO friendly URLs Infinitely extensible

<?php $this->load->model(‘feature’); $data[‘features’] = $this->feature->get_all(); $this->load->view(‘features’, $data);

“I found CodeIgniter the lightest framework out there and it doesn’t impose too many restrictions.”

Rasmus LerdorfCreator of PHPInfrastructure Architect, Yahoo

Model (models/post.php)

<?phpclass Post extends Model { function Post() { parent::Model(); }

function get_all() { $this->db->order_by(‘postdate’, ‘DESC’); $query = $this->db->get(‘posts’, 10, 0); if ($query->num_rows() > 0) { return $query->result(); } return FALSE; }}

Model (models/post.php)

<?phpclass Post extends Model { function Post() { parent::Model(); }

function get_all() { $this->db->order_by(‘postdate’, ‘DESC’); $query = $this->db->get(‘posts’, 10, 0); if ($query->num_rows() > 0) { return $query->result(); } return FALSE; }}

Model (models/post.php)

<?phpclass Post extends Model { function Post() { parent::Model(); }

function get_all() { $this->db->order_by(‘postdate’, ‘DESC’); $query = $this->db->get(‘posts’, 10, 0); if ($query->num_rows() > 0) { return $query->result(); } return FALSE; }}

Controller (controllers/posts.php)

<?phpclass Posts extends Controller { function Posts() { parent::Controller(); }

function index() { $this->load->model(‘post’); $data[‘posts’] = $this->post->get_all(); $this->load->view(‘home’, $data); }}

Controller (controllers/posts.php)

<?phpclass Posts extends Controller { function Posts() { parent::Controller(); }

function index() { $this->load->model(‘post’); $data[‘posts’] = $this->post->get_all(); $this->load->view(‘home’, $data); }}

Controller (controllers/posts.php)

<?phpclass Posts extends Controller { function Posts() { parent::Controller(); }

function index() { $this->load->model(‘post’); $data[‘posts’] = $this->post->get_all(); $this->load->view(‘home’, $data); }}

View (views/home.php)

<!-– html, head, body tag --><?php foreach($posts as $p): ?> <div class=“post”> <h2><?php echo $p->title; ?></h2> <div class=“excerpt”> <?php echo $p->excerpt; ?> </div> <p><?php echo anchor($p->id, ‘Read More’); ?

></p> </div><?php endforeach; ?><!-- /body, /head, /html tags -->

View (views/home.php)

<!-– html, head, body tag --><?php foreach($posts as $p): ?> <div class=“post”> <h2><?php echo $p->title; ?></h2> <div class=“excerpt”> <?php echo $p->excerpt; ?> </div> <p><?php echo anchor($p->id, ‘Read More’); ?

></p> </div><?php endforeach; ?><!-- /body, /head, /html tags -->

View (views/home.php)

<!-– html, head, body tag --><?php foreach($posts as $p): ?> <div class=“post”> <h2><?php echo $p->title; ?></h2> <div class=“excerpt”> <?php echo $p->excerpt; ?> </div> <p><?php echo anchor($p->id, ‘Read More’); ?

></p> </div><?php endforeach; ?><!-- /body, /head, /html tags -->

View (views/home.php)

<!-– html, head, body tag --><?php foreach($posts as $p): ?> <div class=“post”> <h2><?php echo $p->title; ?></h2> <div class=“excerpt”> <?php echo $p->excerpt; ?> </div> <p><?php echo anchor($p->id, ‘Read More’); ?

></p> </div><?php endforeach; ?><!-- /body, /head, /html tags -->

View (views/home.php)

<!-– html, head, body tag --><?php foreach($posts as $p): ?> <div class=“post”> <h2><?php echo $p->title; ?></h2> <div class=“excerpt”> <?php echo $p->excerpt; ?> </div> <p><?php echo anchor($p->slug, ‘Read More’); ?

></p> </div><?php endforeach; ?><!-- /body, /head, /html tags -->

example.com/refreshaugust-may-2009

Questions?

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