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Introduction to CodeIgniter Ed Finkler http://funkatron.com - PowerPoint PPT Presentation

Mar 19, 2024 •229 likes •600 views

Introduction to CodeIgniter Ed Finkler http://funkatron.com @funkatron codeworks09 Thee Agenda Why CodeIgniter? The CI MVC Model CI Basics Running CI out of the box Making a basic web app Making a web api

  1. Introduction to CodeIgniter Ed Finkler • http://funkatron.com • @funkatron codeworks09

  2. Thee Agenda Why CodeIgniter? The CI MVC Model CI Basics Running CI out of the box Making a basic web app Making a web api

  3. http://www.flickr.com/photos/alternatewords/2332580309/ Why CodeIgniter?

  4. Why not CakePHP or Zend Framework or Limonade or Symfony or Solar or Kohana or Zoop or Yii or Akelos or PHP on Trax or Prado or Seagull?

  5. Because you've gotta pick one, dammit

  6. All of them have value

  7. That being said, CI is… Easy to understand Simple doesn't require advanced OOP Doesn't force lots of conventions Plays well with others Quick to get up and running Good docs and great community Backed by invested entity (http://ellislab.com)

  8. CodeIgniter MVC Implementation

  9. More like "Passive View Pattern" Controller View Model http://short.ie/5o7eg4

  10. CI application flow Stolen from CI user guide

  11. App components Front controller Helper Routing Plugin Security Scripts Controller View Model Caching Library

  12. Front controller index.php

  13. Routing http://domain.com/index.php/controller/method/param class Search extends Controller { public function single($id) { // [...] } }

  14. Security Filtering or blocking unsafe input

  15. Controller The core of everything <?php class Site extends Controller { "Heavy": you could do function Site() { parent::Controller(); everything in controller $this->load->library('session'); } public methods are function index() { available as actions from // mletters model is auto-loaded $rows = $this->mletters->getMany(10); URL $data['rows'] = $this->_prepData($rows); $this->load->view('index', $data); } private methods prefixed with “_” function _prepData($rows) { // do some cleanup on the data… } ?>

  16. Model ActiveRecord pattern available, not required Query binding $sql = "SELECT * FROM some_table WHERE id = ? AND status = ? AND author = ?"; $this->db->query($sql, array(3, 'live', 'Rick')); Don't like the DB layer? Use something else Zend_DB, Doctrine, DataMapper (http://bit.ly/ datamapper), IgniteRecord (http://bit.ly/igrec) …

  17. Library A class designed to work on related tasks

  18. Helper Procedural funcs, grouped by file Mostly for views; available in controllers /** * Plural * * Takes a singular word and makes it plural * * @access public * @param string * @param bool * @return str */ function plural($str, $force = FALSE) { // [...] }

  19. Plugin Single procedural function More extensive functionality than helper $vals = array( 'word' => 'Random word', 'img_path' => './captcha/', 'img_url' => 'http://example.com/captcha/', 'font_path' => './system/fonts/texb.ttf', 'img_width' => '150', 'img_height' => 30, 'expiration' => 7200 ); $cap = create_captcha($vals); echo $cap['image'];

  20. Script Other scripts the CI app might use

  21. View Build response to client CI Views are limited Uses plain PHP as templating lang <?php foreach ($rows as $row): ?> <li class="letter"> <div class="body"> <h3>Dear Zend,</h3> <p><?=$row->body?></p> </div> <div class="meta"> <div class="posted"> <a href="<?=site_url('/site/single/'.$row->id)?>">Posted <?=$row->posted?></a> </div> <div class="favorite">Liked by <?=$row->favorite_count?> person(s). <a href="<?=site_url('/site/favorite/'.$row->id)?>">I like this</a> </div> </div> </li> <?php endforeach ?>

  22. View Optional template markup $this->load->library('parser'); <html> $this->parser->parse('blog_template', $data); <head> <title>{blog_title}</title> </head> <body> <h3>{blog_heading}</h3> {blog_entries} <h5>{title}</h5> Want a heavier template lang? <p>{body}</p> {/blog_entries} Use one. </body> </html>

  23. Caching Saves response to file Serves up file contents if cache not expired

  24. CI Basics http://www.flickr.com/photos/canoafurada/395304306/

  25. CI File Layout front controller index.php points to system and application folders system application base classes & app-specific classes built-in functionality & functionality

  26. CI File Layout default layout

  27. CI File Layout custom layout only index.php is under document root

  28. The CI Object $this inside controllers

  29. The loader $this->load->{view|library|model|helper|etc}('name');

  30. CI Out of the box

  31. The Welcome App Put CI on the server Load it in the browser Why does Welcome load? How URLs map Trace with Xdebug/MacGDBp

  32. Making a web application

  33. Population estimates DB Get our data from Numbrary: http://short.ie/w3f6h3 Make a new controller Change the default route Config DB settings Make a model Make a view Make fancier views

  34. Make a web API http://www.flickr.com/photos/dunechaser/2429621774/

  35. Web API for pop. est. DB Let users query our DB via HTTP Return results on JSON or serialized PHP

  36. Questions? http://www.flickr.com/photos/deadhorse/508559841/ @funkatron/#cw09 coj@funkatron.com

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