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Introduction to CodeIgniter

Introduction to CodeIgniter. Ian J Robotham Software Development Lead Medi-CAL Unit, University of Aberdeen. Who?. Ellis Labs Inc. Based in Bend, Oregon. What?. Open source Web Application Framework Lightweight Available for 5 years. Why?. Rapid Application Development

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Introduction to CodeIgniter

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  1. Introduction to CodeIgniter Ian J Robotham Software Development Lead Medi-CAL Unit, University of Aberdeen

  2. Who? • Ellis Labs Inc. • Based in Bend, Oregon

  3. What? • Open source Web Application Framework • Lightweight • Available for 5 years

  4. Why? • Rapid Application Development • Noted for Speed • Handles much of the mundane – query processing, pagination, validation etc.

  5. MVC Controller View Model

  6. Getting Started • http://codeigniter.com/downloads/ • Download, extract & rename = “working” app • Configure & Code

  7. Security • URL • Anti register_globals • XSS Filtering • CSRF • Automatic GET/POST/COOKIE cleaning • Database escaping

  8. Active Record • Modified version of design pattern • Database independence* • Allows chaining (PHP5+) $query = $this->db->from(‘users’) ->where(‘dept’, ‘DIT’) ->order_by(‘lastnameasc’); foreach ($query->result() as $row) { echo $row->firstname.’ ‘.$row->lastname; }

  9. Form Validation • In controller • Some exists but can write own tests $this->load->library('form_validation'); $this->form_validation->set_rules('username', 'Username', 'required'); $this->form_validation->set_rules('password', 'Password', 'required'); $this->form_validation->set_rules('passconf', 'Password Confirmation', 'required'); $this->form_validation->set_rules('email', 'Email', 'required|valid_email'); if ($this->form_validation->run() == FALSE) { $this->load->view('myform'); } else { $this->load->view('formsuccess'); }

  10. Libraries • Classes to add functionality • Write own (or use other external) • Extend native CI libraries • Replace native CI libraries • E.g. use to add TCPDF for PDF generation or ExcelWriter etc. • Can call elements of CI core

  11. Helpers • Collection of functions • Not OO • Independent • Can use in views, controller • Can call CI core if needed

  12. Inheritance • Useful in Controllers & Models • Create UOA_Model which each model extends • Handle simple CRUD calls • Create UOA_Controller which each controller extends • Handle common functions e.g. security checks etc.

  13. Sparks • Fairly new • http://getsparks.org/ • Repository of CI libraries (kind of) • API integrations e.g. Flickr, Google, Twitter • Payment integrations • Authentication & more • Don’t reinvent the wheel

  14. Other Options • Zend Framework • CakePHP • Symfony • Yii • http://www.phpframeworks.com/ • http://www.phpframeworks.com/top-10-php-frameworks/

  15. Questions? • i.robotham@abdn.ac.uk • 01224 437036 (UOA 7036) • @eyejaynet

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