PHP 反射机制实现动态代理的代码

演示用代码如下所示： 

<?php 
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(); 
?>

输出结果：
In Class One
可见，通过代理类ClassOneDelegator来代替ClassOne类来实现他的方法。
同样的，如下的代码也是能够运行的：

<?php 
class ClassOne { 
function callClassOne() { 
print "In Class One"; 
} 
} 
class ClassOneDelegator { 
private $targets; 
function addObject($obj) { 
$this->target[] = $obj; 
} 
function __call($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->addObject(new ClassOne()); 
$obj->callClassOne(); 
?>