PHP反射API–利用反射技术实现的插件系统架构

2012年4月2日 发表评论 阅读评论

<?php
/*
反射
*/
class ClassOne {
function callClassOne() {
print "In Class One";
}
}
class ClassOneDelegator {
private $targets;
function __construct() {
$this->target[] = new ClassOne();
}
function __call($name, $args) {
foreach ($this->target as $obj) {
$r = new ReflectionClass($obj);
if ($method = $r->getMethod($name)) {
if ($method->isPublic() && !$method->isAbstract())
{
return $method->invoke($obj, $args);
}
}
}
}
}
$obj = new ClassOneDelegator();
$obj->callClassOne();

/**
* @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();
}

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’));
}
}

function findPlugins()
{
//get_declared_classes 取得自定义的类
$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 代码如下

?>


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