Source

.emacs.d / files / multi-web-mode.el

(require 'multi-web-mode)
(setq mweb-default-major-mode 'html-mode)
(setq mweb-tags '((php-mode "<\\?php\\|<\\? \\|<\\?=" "\\?>")
                  (javascript-mode "<script +\\(type=\"text/javascript\"\\|language=\"javascript\"\\)[^>]*>" "</script>")
                  (css-mode "<style +type=\"text/css\"[^>]*>" "</style>")))
(setq mweb-filename-extensions '("php" "htm" "html" "ctp" "phtml" "php4" "php5"))
(multi-web-global-mode 1)

(defun my-html-mode-setup ()
  (emmet-mode 1))
(add-hook 'html-mode-hook 'my-html-mode-setup)