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php反射类ReflectionClass用法分析,reflectionclass用法
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php反射类ReflectionClass用法分析,reflectionclass用法

Jun 13, 2016 am 08:40 AM
php

php反射类ReflectionClass用法分析,reflectionclass用法

本文实例讲述了php反射类ReflectionClass用法。分享给大家供大家参考,具体如下:

先来看一段代码:

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/**

 * @name PHP反射API--利用反射技术实现的插件系统架构

 * @author :PHPCQ.COM

 */

interface Iplugin

{

 public static

 function getName();

}

function findPlugins()

{

 $plugins = array();

 foreach(get_declared_classes() as $class)

 {

  $reflectionClass = new ReflectionClass($class);

  if ($reflectionClass - > implementsInterface('Iplugin'))

  {

   $plugins[] = $reflectionClass;

  }

 }

 return $plugins;

}

function computeMenu()

{

 $menu = array();

 foreach(findPlugins() as $plugin)

 {

  if ($plugin - > hasMethod('getMenuItems'))

  {

   $reflectionMethod = $plugin - > getMethod('getMenuItems');

   if ($reflectionMethod - > isStatic())

   {

    $items = $reflectionMethod - > invoke(null);

   }

   else

   {

    $pluginInstance = $plugin - > newInstance();

    $items = $reflectionMethod - > invoke($pluginInstance);

   }

   $menu = array_merge($menu, $items);

  }

 }

 return $menu;

}

function computeArticles()

{

 $articles = array();

 foreach(findPlugins() as $plugin)

 {

  if ($plugin - > hasMethod('getArticles'))

  {

   $reflectionMethod = $plugin - > getMethod('getArticles');

   if ($reflectionMethod - > isStatic())

   {

    $items = $reflectionMethod - > invoke(null);

   }

   else

   {

    $pluginInstance = $plugin - > newInstance();

    $items = $reflectionMethod - > invoke($pluginInstance);

   }

   $articles = array_merge($articles, $items);

  }

 }

 return $articles;

}

require_once('plugin.php');

$menu = computeMenu();

$articles = computeArticles();

print_r($menu);

print_r($articles);

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plugin.php 代码如下:

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<&#63;php

class MycoolPugin implements Iplugin

{

 public static

 function getName()

 {

  return 'MycoolPlugin';

 }

 public static

 function getMenuItems()

 {

  return array(array('description' => 'MycoolPlugin', 'link' => '/MyCoolPlugin'));

 }

 public static

 function getArticles()

 {

  return array(array('path' => '/MycoolPlugin', 'title' => 'This is a really cool article', 'text' => xxxxxxxxx));

 }

}

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上述代码是php反射类的一个应用。

什么是php反射类,顾名思义,可以理解为一个类的映射。

举个例子:

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class fuc { //定义一个类

 static

 function ec() {

  echo '我是一个类';

 }

}

$class=new ReflectionClass('fuc'); //建立 fuc这个类的反射类

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至于$class 这反射类里有什么东东,可以查看手册,这里不详解了

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$fuc=$class->newInstance(); //相当于实例化 fuc 类

$fuc->ec(); //执行 fuc 里的方法ec

/*最后输出:我是一个类*/

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其中还有一些更高级的用法

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$ec=$class->getmethod('ec'); //获取fuc 类中的ec方法

$fuc=$class->newInstance(); //实例化

$ec->invoke($fuc);   //执行ec 方法

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上面的过程很熟悉吧。其实和调用对象的方法类似

只不过这里是反着来的,方法在前,对象在后

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更多关于PHP相关内容感兴趣的读者可查看本站专题:《PHP数组(Array)操作技巧大全》、《php排序算法总结》、《PHP常用遍历算法与技巧总结》、《PHP数据结构与算法教程》、《php程序设计算法总结》、《PHP数学运算技巧总结》、《php正则表达式用法总结》、《PHP运算与运算符用法总结》、《php字符串(string)用法总结》及《php常见数据库操作技巧汇总》

希望本文所述对大家PHP程序设计有所帮助。

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