Pure PHP/HTML views VS template engines views

Question

I would like to know which approach is faster, using the pure PHP in the HTML files or using a template engines like Smarty,Twig, ... What I would particularly like to know

Answer 1

I have a problem with the argument that logic and data display must be separared as much as possible. I found that data validation and display actually requires a lot of logic on forms. Information about data type, number range, relation between different data requires a lot of code. The real question is should we use a template language on the server side or Javascript on the client side. By using Ajax and client side code for data display and validation, I end up having very little template code. The biggest problem with template engines is the intoduction of new code rules and syntax. I see the future with PHP, Jquery and Ajax and template engines loosing its appeal.