Fatal error: Using $this when not in object context in /

[sampathkumara]

Hi All,

 

I think anyone should have solution for this.

 

I ma getting below error when click checkout confirmation button.

 

I believe this is php language problem but i have no idea how to solve it.

 

Fatal error: Using $this when not in object context in /home/content/....includes/classes/discount_coupon.php on line 165