php 混合器 ,间接实现 类的多继承

 

<?php


/**
 * php 混合器 ,间接实现 类的多继承
 *
 * @author sdm
 */
class Qing_Mix {

    private $objs = array();

    public function __construct($objs) {
        $this->objs = func_get_args();
        foreach ($this->objs as &$obj) {
            $obj->mix = &$this;
        }
    }

    public function __get($name) {
        foreach ($this->objs as &$obj) {
            if (property_exists($obj, $name)) {
                return $obj->$name;
            }
        }
    }

    public function __set($name, $value) {
        foreach ($this->objs as &$obj) {
            if (property_exists($obj, $name)) {
                return $obj->$name = $value;
            }
        }
    }

    public function __isset($name) {
        foreach ($this->objs as &$obj) {
            if (property_exists($obj, $name)) {
                return true;
            }
        }
        return false;
    }

    public function __call($name, $arguments) {
        foreach ($this->objs as &$obj) {
            if (method_exists($obj, $name)) {
                return call_user_func_array(array($obj, $name), $arguments);
            }
        }
    }

}

//测试
if (__FILE__ == realpath($_SERVER['SCRIPT_FILENAME'])) {

    function Test_Qing_Mix() {

        class Test_Qing_Mix_A {

            public $a = 1;

            function fun1() {
                echo "fun1 called\n";
            }

        }

        class Test_Qing_Mix_B {

            public $b = 1;

            function fun2() {
                echo "fun2 called\n";
            }

            function fun3() {
                echo "will call fun1 called\n";
                //调用当前混合器的 fun1 方法
                $this->mix->fun1();
            }

        }

        $mix = new Qing_Mix(new Test_Qing_Mix_A(), new Test_Qing_Mix_B());
        echo "will call fun1\n";
        //调用混合器的fun1
        $mix->fun1();

        echo "will call fun2\n";
        $mix->fun2();

        $mix->fun3();
    }

    Test_Qing_Mix();
}

输出结果

 

will call fun1

fun1 called

will call fun2

fun2 called

will call fun1 called

fun1 called

 

参考：php-qing 框架

http://sf.net/p/php-qing/