Usage analysis of php reflection class ReflectionClass_php skills

the example in this article describes the usage of the php reflection class reflectionclass. share it with everyone for your reference, the details are as follows:

let’s look at a piece of code first:

/**
 * @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);

plugin.php code is as follows:

<?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));
 }
}

the above code is an application of the php reflection class.

what is a php reflection class? as the name suggests, it can be understood as a mapping of a class.

for example:

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

as for what is in the reflection class $class, you can check the manual, but i won’t explain it in detail here

$fuc=$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*/

there are also some more advanced uses

$ec=$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

the above process may be familiar. in fact, it is similar to the method of calling the object

it’s just that it’s the other way around, with the method in front and the object in the back

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i hope this article will be helpful to everyone in php programming.