Introduction to Using PHP & MVC Frameworks

1. From Spaghetti to MVC Hanafiah Yahya

2. Who is Hanafiah Yahya? ● Muhamad Hanafiah Bin Yahya ● Digital Immigrants generations ● Started programming, 1997 - MIRC script, VBA, Pascal, ● https://my.linkedin.com/in/hanafiahyahya

3. Our Awesome Programs

4. http://www.kreydle.com/academy/

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8. Topics 1. Spaghetti Code 2. MVC introduction 3. PHP MVC frameworks 4. Working with CodeIgniter 5. Config 6. Model 7. View 8. Controller 9. Continue your journey

9. Survey 1. Home many students/fresh graduate here? 2. Code in PHP? 3. Used MVC?

11. http://www.venicecafechicago.com/wp-content/uploads/2014/07/venicea01.jpg Spaghetti

12. Why Spaghetti? - metaphor Things get really messy when connecting each other

13. back to the invention of http://i144.photobucket.com/albums/r166/Funnyoldlife/tin-can-telephone.jpg A B

14. Spaghetti A B C

15. Spaghetti A B C D E F

16. Spaghetti A B C D E F G H I J

17. Spaghetti A B C D E F G H I J

18. Formula # Phones # Lines/ Connections 2 1 3 3 4 6 5 10 10 45 20 190 1000 ?

19. Formula # Phones # Lines 10 45 20 190 1000 499,500 Formula #Lines = ( p * ( p - 1 ) ) / 2 *p = phone

20. Where is my server?

21. Spaghetti Code 1) Spaghetti code is a specific [ goto 8 ] 2) written in order, but splattered [ goto 9 ] 3) allowed to jump to a specific [ goto 7 ] 4) the goto statement, which [ goto 3 ] 5) a set of instructions is not [ goto 2 ] 6) spaghetti. It often refers to [ goto 4 ] 7) line of code. [ end ] 8) kind of bad coding, where [ goto 5 ] 9) all over the place ( like a knotted [ goto 6 ] )

22. Solution?

23. Solution? better design pattern HUB

24. Result # Phones # Lines 2 1 3 3 4 6 5 10 10 45 20 190 1000 499,500 # Phones # Lines 2 2 3 3 4 4 5 5 10 10 20 20 1000 1000 Original Refactor

25. MVC Heroes http://www.helenbrowngroup.com/wp-content/uploads/2014/09/info-pro-as-superman.jpg

26. Enough Theory! Lets see some code

27. SQL Query DB Connection

28. SQL Query HTML Code

29. Business Logic Presentation Presentation

30. Spaghetti Code http://masterphp.local/spaghetti/ https://github. com/hanafiah/masterphp/tree/master/spaghetti

32. History Invented in 1979 by Smalltalk programmers, Trygve Reenskaug It is software design pattern http://heim.ifi.uio.no/~trygver/themes/mvc/mvc-index.html

33. History 1979?.. so old Made popular by Ruby On Rails initial release on 2005 and adapted by PHP community https://upload.wikimedia.org/...n_Rails.svg.png

34. Why MVC? ● Organized & structured ● Separation of code ● loose coupling ● Easy code maintenance ● Reusable code. DRY - Don’t Repeat Yourself

35. Model View Controller User Uses ManipulateUpdates Sees

36. Model View Controller User Uses ManipulateUpdates Sees - Represent Knowledge - Manages data, logic and rules of the application. - Business Logic

37. Model View Controller User Uses ManipulateUpdates Sees - The output, whats user see. - Visual represent of the Model - Presentation layer

38. Model View Controller User Uses ManipulateUpdates Sees the middleman / link between user and the system

39. Model View Controller User Uses ManipulateUpdates Sees The flow

45. http://www.makemark.co.uk/wp-content/uploads/2011/05/infooverload_full.jpg

46. PHP MVC Frameworks 1. CodeIgniter 2. Laravel 3. Symfony 4. CakePHP 5. FuelPHP 6. YII 7. … more

48. Why CodeIgniter Why not CakePHP or Laravel or Symfony or FuelPHP or YII or Zend Framework or Kohana or Zoop or Akelos or PHP on Trax or Prado or Seagull or …?

49. Why CodeIgniter Because you’ve gotta pick one

50. That being said, CI is not dead! ● easy to understand ● simple, doesn't require advance OOP ● quick to get up and running ● good docs

51. CodeIgniter is a powerful PHP framework with a very small footprint, built for developers who need a simple and elegant toolkit to create full- featured web applications. CodeIgniter http://www.codeigniter.com

55. Config - database application/config/database.php

56. $db['default'] = array( 'dsn' => '', 'hostname' => 'localhost', 'username' => 'root', 'password' => '', 'database' => ‘master_php’, 'dbdriver' => 'mysqli', 'dbprefix' => '', 'pconnect' => FALSE, 'db_debug' => TRUE, 'cache_on' => FALSE, 'cachedir' => '', 'char_set' => 'utf8', 'dbcollat' => 'utf8_general_ci', 'swap_pre' => '', 'encrypt' => FALSE, 'compress' => FALSE, 'stricton' => FALSE, 'failover' => array(), 'save_queries' => TRUE ); http://www.codeigniter.com/user_guide/database/configuration.html <?php $host = 'localhost'; $dbname = 'master_php'; $user = 'root'; $pass = ''; try { // Connecting to MySQL $dbh = new PDO("mysql: host=$host;dbname=$dbname", $user, $pass);

57. Config - autoload application/config/autoload.php

59. Model View Controller User Uses ManipulateUpdates Sees http://www.codeigniter.com/user_guide/general/models.html

60. Models application/models/m_users.php

61. <?php public function get_users() { $query = $this->db->get('users'); return $query->result(); } <?php // Get all users $stmt = $dbh->prepare("SELECT * FROM users"); $stmt->setFetchMode(PDO::FETCH_ASSOC); if ($stmt->execute()) { while ($row = $stmt->fetch()) { Model - Get all users

62. <?php public function insert() { $this->name = $this->input->post('name'); // similar to $_POST['name']; $this->age = $this->input->post('age'); $this->email = $this->input->post('email'); $this->db->insert('users', $this); } <?php $stmt = $dbh->prepare("INSERT INTO users ( name, age, email ) values ( :name, :age, :email )"); $stmt->bindParam(':name', $name, PDO::PARAM_STR); $stmt->bindParam(':age', $age, PDO::PARAM_INT); $stmt->bindParam(':email', $email, PDO::PARAM_STR); $name = $_POST['name']; $age = $_POST['age']; $email = $_POST['email']; $stmt->execute(); Model - Add new user

63. <?php public function update() { $this->name = $this->input->post('name'); // similar to $_POST['name']; $this->age = $this->input->post('age'); $this->email = $this->input->post('email'); $this->db->update('users', $this, array('id' => $this->input->post('id'))); } <?php $stmt = $dbh->prepare("UPDATE users SET name = : name, age = :age, email = :email WHERE id = :id"); $stmt->bindParam(':name', $name, PDO::PARAM_STR); $stmt->bindParam(':age', $age, PDO::PARAM_INT); $stmt->bindParam(':email', $email, PDO::PARAM_STR); $stmt->bindParam(':id', $id, PDO::PARAM_INT); $name = $_POST['name']; $age = $_POST['age']; $email = $_POST['email']; $id = $_POST['id']; $stmt->execute(); Model - Edit user

64. <?php public function delete($id = FALSE) { $this->db->delete('users', array('id' => $id)); } <?php $stmt = $dbh->prepare("DELETE FROM users WHERE id = :id LIMIT 1"); $stmt->bindParam(':id', $id, PDO::PARAM_STR); $id = $_GET['delete']; $stmt->execute(); Model - Delete user

65. Model github repo https://github. com/hanafiah/masterphp/blob/master/mvc/application/mod els/m_users.php https://github. com/hanafiah/masterphp/tree/master/spaghetti

67. http://www.makemark.co.uk/wp-content/uploads/2011/05/infooverload_full.jpg

68. Model View Controller User Uses ManipulateUpdates Sees http://www.codeigniter.com/user_guide/general/views.html

69. 3 View files application/views/*

70. <?php foreach ($users as $user) { ?> <tr> <td><?php echo $user->id; ?></td> <td><?php echo $user->name; ?></td> <td><?php echo $user->age; ?></td> <td><?php echo $user->email; ?></td> <td> ... <?php // Get all users $stmt = $dbh->prepare("SELECT * FROM users"); $stmt->setFetchMode(PDO::FETCH_ASSOC); if ($stmt->execute()) { while ($row = $stmt->fetch()) { ?> <tr> <td><?php echo $row['id']; ?></td> <td><?php echo $row['name']; ?></td> <td><?php echo $row['age']; ?></td> <td><?php echo $row['email']; ?></td> <td> ... Views - listing

71. View github repo https://github. com/hanafiah/masterphp/tree/master/mvc/application/views https://github. com/hanafiah/masterphp/tree/master/spaghetti

73. Model View Controller User Uses ManipulateUpdates Sees http://www.codeigniter.com/user_guide/general/controllers.html

74. Controller A Controller is simply a class file that is named in a way that can be associated with a URI.

75. Relation with url http://example.com/index.php/CLASS/METHOD/PARAM http://masterphp.local/mvc/index.php/users/edit/2 <?php class Users extends CI_Controller { public function edit($id=FALSE) { if (isset($_POST['btnEdit'])) { $this->m_users->update(); redirect('users'); } $this->view_data['user'] = $this->m_users->get_user($id); $this->load->view('v_edit_user', $this->view_data); }

78. Relation with url http://example.com/index.php/CLASS/METHOD/PARAM1/PARAM2 http://masterphp.local/mvc/index.php/users/edit/2/3 <?php class Users extends CI_Controller { public function edit($id=FALSE, $param = ‘’) { if (isset($_POST['btnEdit'])) { $this->m_users->update(); redirect('users'); } $this->view_data['user'] = $this->m_users->get_user($id); $this->load->view('v_edit_user', $this->view_data); }

79. application/controllers/*

80. Controller git repo https://github. com/hanafiah/masterphp/blob/master/mvc/application/contr ollers/users.php

82. pretty url http://masterphp.local/mvc/index.php/users/edit/2 http://masterphp.local/mvc/users/edit/2 1. add .htaccess to root directory /applications /index.php /.htaccess RewriteEngine On RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule ^(.*)$ index.php/$1 [L]

83. pretty url http://masterphp.local/mvc/index.php/users/edit/2 http://masterphp.local/mvc/users/edit/2 2. edit config file and delete index.php applications/config/config.php <?php $config['index_page'] = 'index.php'; become $config['index_page'] = '';

84. Continue your journey 1. Library - the classes 2. Helpers - set of functions eg: url, { base_url(), site_url(), anchor() } 3. Database Classes & Helper 4. Custom URL Routing 5. more..

85. http://suttonschoolswork.co.uk/wp-content/uploads/2014/10/questionmark.jpg

86. https://www.facebook.com/kreydle

87. Thank You Slide https://goo.gl/dzfn0D repo https://github.com/hanafiah/masterphp https://www.facebook.com/hanafiah.yahya hanafiah@kreydle.com

Introduction to Using PHP & MVC Frameworks

Gerald Krishnan

Introduction to Using PHP & MVC Frameworks