php用数组的键匹配类的方法，然后赋值给参数，如果没有匹配到方法，那就给成员变量赋值

class initialize
{
    public $command='';
    public $say='';
    public $controller='';


    function __construct(array $config=array()){
        $this->init($config);
    }
    public function init(array $config=array())
    {
        foreach($config as $key=>$val) {
            if (isset($this->$key)) {

                $method = 'set_' . $key;

                if (method_exists($this, $method)) {
                    $this->$method($val);
                } else {
                    $this->$key = $val;
                }
            }
        }
    }

    public function set_command($cmd)
    {
        return $this->command=$cmd;
    }
    public function getcommand()
    {
        return $this->command;
    }

    public function getsay()
    {
       return  $this->say;
    }

    public function getcontroller($controller='models')
    {
        return $this->controller=($controller==='models') ? 'models' :'view';
    }

}
$arrstr=array(
    'command'=>'这是一个命令，取得成员函数',
    'say'    =>'这是为成员变量赋值',
    'controller'    => ''
);
$init=new initialize($arrstr);
$init->set_command('成员函数直接赋值');
echo $init->getcommand();
echo $init->getsay();
echo $init->getcontroller('view');