什么是使用PHP和HTML的正确方法

I have created many sites that requires php, html and css. They all work fine but i'm now thinking if all that time i do it in a wrong way. Usually, first i build the site template and styling and then i code the php. Then i just include the php functions etc in the HTML. For example take a look of a table that lists some posts (index.php):I have created many sites that requires php, ht