Pretty-printing Wordpress HTML output for development purposes

Is there a simple way (plugin / function) that uses Tidy or some other lib to pretty-print Wordpress's HTML output?

It's unreadable as it is and it'开发者_Go百科s almost impossible to write a theme with proper indentation with all the includes / hooks going on all over the place.

Performance is not an issue as this only needs to be active for development purposes.

I suggest:

1. Get Firebug
2. Use PHP heredocs
3. Include whitespace in your output using \n (newline), \t (tab), etc.

Give Kint PHP Debugger a try.

Works great for doing var_dumps with a nice UI.

Example:

$items = array('pine', 'apple', array('numbers' => [1,2,3,4]));
d($items);