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mvc ,流程顺了,还是手生
张浩刚
Original
624 people have browsed it

model.php

  1. <?php
  2. namespace mvc;
  3. use PDO;
  4. class Model{
  5. public function __construct($a='mysql:host=localhost;dbname=film', $b='root', $c='root', $table='user')
  6. {
  7. $this->pdo = new PDO($a,$b,$c);
  8. $this->table = $table;
  9. }
  10. public function select(){
  11. $sql = "SELECT id,name,tel FROM {$this->table}";
  12. $stmt = $this->pdo->prepare($sql);
  13. $stmt->execute();
  14. return $stmt->fetchAll(PDO::FETCH_ASSOC);
  15. }
  16. }

view.php

  1. <?php
  2. namespace mvc;
  3. class View{
  4. public function fetch($data){
  5. $table = '<table>';
  6. $table .= '<caption>商品列表</caption>';
  7. $table .= '<tr><th>ID</th><th>品名</th><th>型号</th></tr>';
  8. foreach($data as $v){
  9. $table .= '<tr>';
  10. $table .= '<td>' . $v['id'] . '</td>';
  11. $table .= '<td>' . $v['name'] . '</td>';
  12. $table .= '<td>' . $v['tel'] . '</td>';
  13. $table .= '</tr>';
  14. }
  15. $table .= '</table>';
  16. return $table;
  17. }
  18. }
  19. echo '<style>
  20. table {border-collapse: collapse; border: 1px solid; width: 500px;height: 170px}
  21. caption {font-size: 1.2rem; margin-bottom: 10px;}
  22. tr:first-of-type { background-color:lightblue;}
  23. td,th {border: 1px solid}
  24. td{text-align: center}
  25. </style>';

demo.php

  1. <?php
  2. namespace mvc;
  3. use Closure;
  4. require __DIR__ . '/model.php';
  5. require __DIR__ . '/view.php';
  6. //添加服务容器层
  7. class Container{
  8. //容器属性时一个空数组,里面装创建对象的方法
  9. protected $contt = [];
  10. // 放进去,把实例化过程绑定到容器中
  11. // $alias 类实类的别名 可以自定义;Closure用于代表 匿名函数 的类
  12. public function bind($alias, Closure $process){
  13. //将类实例化的方法 存储到容器中
  14. $this->contt[$alias] = $process;
  15. }
  16. //取出来,执行容器中的实例方法
  17. public function make($alias, $arr = []){
  18. //call_user_func_array 回调函数,第一个是回调函数,第二个时索引数组
  19. //如call_user_func_array($a, $b) 把($a)作为回调函数调用,把参数数组作($b)为回调函数的参数传入。
  20. return call_user_func_array($this->contt[$alias], $arr);
  21. }
  22. }
  23. $container = new Container();
  24. //把model的实例化过程,绑定到容器中
  25. $container->bind('model', function (){return new Model();});
  26. //把view的实例化过程,绑定到容器中
  27. $container->bind('view', function (){return new View();});
  28. //添加facade门面类
  29. class facade{
  30. protected static $container;
  31. protected static $data = [];
  32. // 导入服务器容器,并静态化
  33. public static function initialize(Container $container){
  34. static::$container = $container;
  35. }
  36. // 导入model,并静态化
  37. public static function getData(){
  38. static::$data = static::$container->make('model')->select();
  39. }
  40. // 导出view,并静态化
  41. public static function fetch(){
  42. return static::$container->make('view')->fetch(static::$data);
  43. }
  44. }
  45. //控制器
  46. class demo{
  47. public function __construct(Container $container)
  48. {
  49. facade::initialize($container);
  50. }
  51. public function getOut(){
  52. //获取数据
  53. facade::getData();
  54. //渲染模板
  55. return facade::fetch();
  56. }
  57. }
  58. //客户端
  59. $demo = new demo($container);
  60. echo $demo->getOut();

结果显示

手抄部分

总结

mvc对我来说,很有难度,做了几遍,流程基本懂了,但还是手生,主要问题在容器层,facade门面。。本周末好好练习

Correcting teacher:天蓬老师天蓬老师

Correction status:qualified

Teacher's comments:写代码之前, 可以画个业务草图
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