اعجاز جالب متدهای جادویی ، مقدار دهی به پروپرتی و اعمال خودکار یک تابع

 
//example class
class example
{
    private $_var = array();
    
    
    public function __set($key,$val)
    {
        if(method_exists($this,$key))
        {
            $this->_var[$key] = call_user_func_array(array($this,$key), array($val));
        }
        else
            $this->_var[$key] = $val;
    }
    
    public function __get($key)
    {
        return isset($this->_var[$key])?$this->_var[$key]:null;
    }
    
    
    private function strtolower($x)
    {
        return strtolower($x);
    }
    
    
    private function password($pass)
    {
        return md5($pass);
    }
}
 
 
 
//example
$obj = new example;
$obj->params1 = "EXAMPLE";
echo $obj->params1; // show: EXAMPLE
 
echo '<br>';
$obj->strtolower = 'REZA';
echo $obj->strtolower; // show : reza
 
echo "<br>";
$obj->password = 'maypass';
echo $obj->password; // show: 2ec1fa252604526dc817c1464e0343b0

 
//main class
class main
{
    private $_var = array();
    private $readonlyParams = array();
    
    protected function setReadOnlyParams($key=null)
    {
        if($key)
            $this->readonlyParams[] = $key;
    }
    
    public function __set($key,$val)
    {
        if( ! in_array($key,$this->readonlyParams))
            $this->_var[$key] = $val;
    }
    
    public function __get($key)
    {
        return isset($this->_var[$key])?$this->_var[$key]:null;
    }
    
    protected function setVar($key,$val)
    {
        $this->_var[$key] = $val;
    }
}
 
 
//child class
 
class child extends main
{
    
    public function __construct()
    {
        parent::setVar('param1','1');
        parent::setReadOnlyParams('param1');
        parent::setVar('param2','2');
    }
}
 
//example
 
$obj = new child;
echo $obj->param1; // show: 1
echo "<br>";
echo $obj->param2; // show: 2
 
echo "<hr>";
 
$obj->param1 = 'new 1';
$obj->param2 = 'new 2';
 
echo $obj->param1; // (read only params!)show:1 
echo "<br>";
echo $obj->param2; // show: new 2