title: html/php debugging
body: <p>I am starting a website, thus I'm learning how to program in html/css/php. For other languages I have learnt so far, there has always been an IDE or interactive console that I can type in codes directly to see how they works, access variable types etc., which makes learning and debugging a breeze. (E.g. bash, python, matlab, perl, tcl...) </p>
  
  <p>Can I do the same for html and php? In the spirit stackoverflow's questions style, lemme try to make the questions a little more specific.</p>
  
  <p>I know I can use php interactively on a terminal. 
  But that is insufficient if I want to see how it works in a html script. 
  <strong>Is there a browser/IDE with a console where I can input commands interactively and see the results?</strong></p>