Introduction to CodeIgniter (RefreshAugusta, 20 May 2009)
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CodeIgniter Introduction to 20 May 2009
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I gave this presentation at the monthly RefreshAugusta meeting on 20 May 2009 at The Well in Downtown Augusta.
Transcript of 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
