Please instalactio ecommerce

I installed the code on the product page but is not working, is something wrong? please help me

<? if(($pg=="produto")){?> <? } ?>

It’s valid PHP code. If short open tags are allowed on your PHP version.
But what exactly should that be good for?

Yes codes are valid, I applied this code on the product page, but does not. access, please visit the link and view the source code at the end of the page. The code starts on line 641. follows the view-source link: http: //