How to make multiple calls to class methods in the same line?

I have an issue in PHP. In my php file, i created the following line:

$foo = $wke->template->notify()
                     ->type("ERROR")
                     ->errno("0x14")
                     ->msg("You are not logged.")
                     ->page("login.tpl");

In the end, I need my $foo variable will return this:

$foo->type = "ERROR" 
$foo->errno= "0x14" 
$foo->msg= "You are not logged." 
$foo->page= "login.tpl"

Please note that the $wke->template is where i need call the notify() element.

The way of calling function of class one by one just by "->" because the function returning the same object of the class. See the example below. You will get this

class Wke {

    public $type;
    public $errno;
    public $msg;
    public $page;

    public $template = $this;

    public function notify(){
        return $this;
    }

    public function errorno($error){
        $this->errno = $error;
        return $this; // returning same object so you can call the another function in sequence by just ->
    }
    public function type($type){
        $this->type = $type;
        return $this;
    }
    public function msg($msg){
        $this->msg = $msg;
        return $this;
    }
    public function page($page){
        $this->page = $page;
        return $this;
    }
}

The whole magic is of return $this;