模板模式-PHP

• 手机系统
• 考试试卷

手机系统

针对不同的手机系统，做不同的测试。

<?php

abstract class Builder {
  // Template method
  final public function build() {
    $this->test();
    $this->lint();
    $this->assemble();
    $this->deploy();
  }

  abstract public function test();
  abstract public function lint();
  abstract public function assemble();
  abstract public function deploy();
}

class AndroidBuilder extends Builder {
  public function test() {
    echo "Running android tests";
  }

  public function lint() {
    echo "Linting the android code";
  }

  public function assemble() {
    echo "Assembling the android build";
  }

  public function deploy() {
    echo "Deploying android build to server";
  }
}

class IosBuilder extends Builder {
  public function test() {
    echo "Running ios tests";
  }

  public function lint() {
    echo "Linting the ios code";
  }

  public function assemble() {
    echo "Assembling the ios build";
  }

  public function deploy() {
    echo  "Deploying ios build to server";
  }
}

// client
$androidBuilder = new AndroidBuilder();
$androidBuilder->build();

// Output:
// Running android tests
// Linting the android code
// Assembling the android build
// Deploying android build to server

$iosBuilder = new IosBuilder();
$iosBuilder->build();

// Output:
// Running ios tests
// Linting the ios code
// Assembling the ios build
// Deploying ios build to server

考试试卷

一份试卷试题，各同学填写的内容不一定相同。

<?php

// 尽量将相同的部分提到父类
// 金庸小说考题试卷
class TestPaper {
  public function TestQuestion1() {
    echo "杨过说过，后来给了郭靖，炼成倚天剑、屠龙刀的玄铁可能是［］a.球磨铸铁 b.马口铁 c.高速合金钢 d.碳素纤维 \n";
    echo "答案 ".$this->answer1()."\n";
  }

  public function TestQuestion2() {
    echo "杨过、程英、陆无双铲除了情花，造成［］a.使这种植物不在害人 b.使一种珍惜物种灭绝 c.破坏了那个生态圈的生态平衡 d.造成该地区沙漠化 \n";
    echo "答案 ".$this->answer2()."\n";
  }

  public function TestQuestion3() {
    echo "蓝凤凰致使华山师徒、桃谷六仙呕吐不止，如果你是大夫，会给他们开什么药［］a.阿司匹林 b.牛黄解毒片 c.氟哌酸 d.让他们喝大量的生牛奶 e.以上全不对";
    echo "答案 ".$this->answer3()."\n";
  }

  protected function answer1(){
    return '';
  }

  protected function answer2(){
    return '';
  }

  protected function answer3(){
    return '';
  }
}

// 学生甲的试卷
class TestPaperA extends TestPaper {
  protected function answer1() {
    return 'a';
  }

  protected function answer2() {
    return 'b';
  }

  protected function answer3() {
    return 'c';
  }
}

// 学生乙的试卷
class TestPaperB extends TestPaper {
  protected function answer1() {
    return 'd';
  }

  protected function answer2() {
    return 'c';
  }

  protected function answer3() {
    return 'a';
  }
}

// client

echo "学生甲的试卷: \n";
$student = new TestPaperA();
$student->TestQuestion1();
$student->TestQuestion2();
$student->TestQuestion3();

echo "学生乙的试卷: \n";
$student2 = new TestPaperB();
$student2->TestQuestion1();
$student2->TestQuestion2();
$student2->TestQuestion3();