add dynamic method to object

<?php

class MyPrinter{
    public static function echoStar($obj,$s){
        echo '*******',$obj->data,'********',$s;
    }
    public static function echoLine($obj,$s){
        echo '<br>--------------',$obj->data,'----------',$s;
    }
    public static function AddTo($obj){
        $m = get_class_methods(__CLASS__);
        foreach($m as $i)$obj->methods[$i] = array(__CLASS__,$i);
    }
}

class MyData
{
    public $methods = array();
    public $data;
    public function  __construct($data) {
        $this->data = $data;
    }
    public function __call($name,$args){
        if (in_array($name,array_keys($this->methods))){
            array_unshift($args,$this);
            return call_user_func_array($this->methods[$name],$args);
        }else{
            die('call undefined function '.$name.'.');
        }
    }
}

$c = new MyData('hello');
MyPrinter::AddTo($c);
echo $c->echoStar('aaaaaaa');
echo '<hr>';
echo $c->echoLine('bbbbbbb');

?>