<?php

/**

* Created by PhpStorm.

* User: pc

* Date: 2018/11/20

* Time: 9:35

*/

class FOO {

public function test() {

echo 'This is the method test of class FOO';

}

}

class BAR {

private $a, $b;

public function __construct($a, $b) {

$this->a = $a;

$this->b = $b;

}

public function test() {

echo 'This is the method test of class BAR<br />';

echo '$this->a=', $this->a, ', $this->b=', $this->b;

}

}

/**

* 利用反射来实例化对象

*/

$class = new ReflectionClass('FOO');

$foo = $class->newInstance(); //或者是$foo = $class->newInstanceArgs();

$foo->test();

$class = new ReflectionClass('BAR');

$bar = $class->newInstanceArgs(array(55, 65));

$bar->test();

/**

* @return object

* @throws ReflectionException

* 通用利用反射来实例化对象的函数

*/

function newInstance() {

$arguments = func_get_args();//获取传递过来的参数

$className = array_shift($arguments);

$class = new ReflectionClass($className);

return $class->newInstanceArgs($arguments);

}

$foo = newInstance('FOO');

$foo->test();

//输出结果：

//This is the method test of class FOO

$bar = newInstance('BAR', 3, 5);

$bar->test();

//输出结果：

//This is the method test of class BAR

//$this->a=3, $this->b=5

/**

* Class INSTANCE

* 使用魔术方法来实现类的实例化

*/

class INSTANCE {

function __call($className, $arguments) {

$class = new ReflectionClass($className);

return $class->newInstanceArgs($arguments);

}

}

$inst = new INSTANCE();

$foo = $inst->foo();

$foo->test();

//输出结果：

//This is the method test of class FOO

$bar = $inst->bar('arg1', 'arg2');

$bar->test();

//输出结果：

//This is the method test of class BAR

//$this->a=3, $this->b=5