class MyClass
{
    public function __call($methodName, $args)
    {
        $methodName = '_' . $methodName;
        if (is_callable(array($this, $methodName))) {
            $this->_beforeCall();
            call_user_func_array(array($this, $methodName), $args);
        }
    }
    
    private function _beforeCall()
    {
        echo "Called _beforeCall\n";
    }

    private function _method1()
    {
        echo "Called method1\n";
    }

    private function _method2()
    {
         echo "Called method2\n";
    }
}

$obj = new MyClass();
$obj->method1();
$obj->method2();