Idea of template calculation after tag identification-PHP source code

First, identify the tags and then calculate the template concept. the traditional template engine idea is: calculate the template variable-> set the template variable (assign)-> integrate the template and display the page.
Now you want to achieve this: identify Template variables-> Calculate Template variables-> integrate and display the page.
Here we provide an idea to use the magic _ call method of PHP.

 $ Method_name ($ args [0]);} else {$ r = $ this-> $ method_name ();} return $ r ;} /*** hello world * @ return string */public function get_test ($ op) {return 'Hello world! ';}}

 Main (); // declare the page tag $ test = $ tpl-> test ();?>