How to get login user id prestashop 1.6

[Ridhi09]

Hi,
I want to get login user id in prestashop 1.6. I have used several methods like 

 $id = $this->context->customer->id;

 $id = (int)$this->context->customer->id;

$id_customer = null;
if ($this->context->customer->isLogged()) {
    // code to execute if i am logued
     $id_customer = $this->context->customer->id;
}

But no data. Can anyone help me with this.

Thanks

[Nishith Nesdiya]

Hi..
use context object

$this->context =Context::getContext() ;

$this->context->customer->id;

http://doc.prestashop.com/display/PS15/Using+the+Context+Object