Symbol's value as variable is void: auto-complete-mode

[alflanagan]

I get the above error when running php-eldoc-enable. It appears to arise from this code:

  (when (and (fboundp 'auto-complete-mode)
             auto-complete-mode)...

This seems to fix it:

  (when (and (fboundp 'auto-complete-mode)
             (auto-complete-mode))...