Add (require 'flymake-proc)

[takeokunn]

The following changes have been commited to the Emacs master branch. https://github.com/emacs-mirror/emacs/commit/81c6569e654966c63f208013a4faf7ddb2a5d933

The places where flymake-proc is used within php-mode are as follows.

$ git grep "flymake-proc" .
lisp/php-flymake.el:  (setq-local flymake-proc-allowed-file-name-masks nil)
lisp/php-mode.el:   (unless (boundp 'flymake-proc-allowed-file-name-masks)

$

https://github.com/emacs-php/php-mode/commit/7e93315a8e28a26f5f8398ecd519beff00ca9a82 I added (require 'flymake-proc) in this commit.

[zonuexe]

@takeokunn Thank you!