php策略模式 

<?php 
          //php策略模式
         interface Math{
             public function calc($op1,$op2);
         }
         class MathAdd implements Math{
           public function calc($op1,$op2){
             return $op1+$op2;
            }
         }
          class MathSub implements Math{
           public function calc($op1,$op2){
             return $op1-$op2;
            }
         }
          class MathMul implements Math{
           public function calc($op1,$op2){
             return $op1*$op2;
            }
         }
          class MathDiv implements Math{
           public function calc($op1,$op2){
             return $op1/$op2;
            }
         }
//封装一个虚拟计算机
      class CMath{
           protected $calc=null;
           public function __construct($type){
                $calc='Math'.$type;
                $this->calc=new $calc();
           }
           public function calc($op1,$op2){
            return   $this->calc->calc($op1,$op2);
            }
      }
    $type=$_POST['op'];
    $cmath=new CMath($type);
    echo  $cmath->calc($_POST['op1'],$_POST['op2']);
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>策略模式</title>
</head>
<body>
        <form action='2.php' method="post">
             <input type="text" name="op1">
             <select name="op">
                        <option value="add">+</option>
                        <option value="sub">-</option>
                        <option value="mul">*</option>
                        <option value="div">/</option>
               </select>
            <input type="text" name="op2">
            <p><input type="submit" name="" value="计算"></p>
        </form>
</body>
</html>

策略模式实现简单的计算器功能

posted @ 2016-08-19 17:33  骏码信息  阅读(181)  评论(0)  编辑  收藏  举报