How to correctly organize the output from the json file to the page?

Question

PHP

Hello.
a little silly question,
there is a file with an html structure (template), there is a json file with data (product information, name, prices, description, etc.), what is the best way to organize output from json into the page code?

I mean do something like:

$file = file_get_contents('./data.json');
$data = json_decode($file); 
...
foreach(){}
...

Or is there something smarter? better... don't use php at all, do everything in javascript