Insert qr code

[notsureabout]

Hello,

I'm trying to insert qr code in product.tpl

The code is showing fine but my qr reader have problem reading it

ps 1.6.0.9

 

I tryed these variables but they don't work

<img src="http://chart.apis.google.com/chart?cht=qr&chs=85x85&chl={$base_dir}{$request_uri}&choe=UTF-8&chld=L|0" />

<img src="http://chart.apis.google.com/chart?cht=qr&chs=85x85&chl={$request_uri}&choe=UTF-8&chld=L|0" />

<img src="https://chart.googleapis.com/chart?cht=qr&chs=85x85&chl={$plink|escape:'url'}&choe=UTF-8&chld=L|0" />

<img src="https://chart.googleapis.com/chart?cht=qr&chs=85x85&chl={$product_link|escape:'url'}&choe=UTF-8&chld=L|0" />

So I'm asking which variable do I have to put in PS 1.6.0.9 instead of

{$base_dir}{$request_uri}

{$request_uri}

{$plink|escape:'url'}

{$product_link|escape:'url'}

 

Thank you

[notsureabout]

{$smarty.server.HTTP_HOST}{$smarty.server.REQUEST_URI}