PHP

Turn on electric pairing in php-mode.

  (add-hook 'php-mode-hook 'electric-pair-local-mode)

Turn on electric indenting in php-mode.

  (add-hook 'php-mode-hook 'electric-indent-local-mode)

Enable flycheck in php-mode.

  (add-hook 'php-mode-hook 'flycheck-mode)

Reset require-final-newline because the default php-mode style disables it.

  (defun oni:set-require-final-newline ()
    (setq require-final-newline t))

  (add-hook 'php-mode-hook 'oni:set-require-final-newline)