(use-package mmm-mode

  :config

  (setq mmm-global-mode 'maybe)
  (mmm-add-mode-ext-class nil "\\.php?\\'" 'html-php)
  (mmm-add-mode-ext-class nil "\\.ctp?\\'" 'html-php)
  (set-face-background 'mmm-default-submode-face nil)
  (mmm-add-classes
   '((html-php
      :submode php-mode
      :front "<\\?\\(php\\)?"
      :back "\\?>")))
  )

(provide 'init-mmm-mode)