How to format php + html code?

Question

PHP

There are many thousands of lines of code in which php and html are mixed:

<?php
if (1) :
?>
    <div class="">test
    </div>
<?php
  echo "test";
endif;
?>

Also mixed space and tab, line breaks and brackets.
How can you automate the process of bringing the whole hodgepodge to a single style?

Answer 1

mixed php and htm

Better option: Ctrl+A -> Delete
A slightly worse option, but also nothing: PhpStorm -> Ctrl+Shift+Alt+L -> Enter

Answer 2

I work in VS Code with WordPress, where PHP is tightly mixed with HTML.
The PHP Intelephense plugin seems to do the trick. I am satisfied.