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Replacing c-beginning/end-of-defun in a Major Mode

From: Eric James Michael Ritz
Subject: Replacing c-beginning/end-of-defun in a Major Mode
Date: Thu, 18 Jul 2013 03:32:21 -0400
User-agent: Mozilla/5.0 (X11; Linux i686; rv:17.0) Gecko/20130623 Thunderbird/17.0.7

Hello everyone,

I am trying to customize the behavior of some commands in a major mode
but I am running into a problem.  I am referring to PHP Mode, and its
definition derives from `c-mode`, i.e. `(define-derived-mode php-mode
c-mode …)`.  Because of that PHP Mode inherits two key-bindings:

1. C-M-a for `c-beginning-of-defun`

2. C-M-e for `c-end-of-defun`

I want PHP Mode to use the functions `php-beginning-of-defun` and
`php-end-of-defun`, respectively.  I can rebind those two keys for PHP
Mode specifically.  However, what I really want is for the two
`php-*-of-defun` functions to replace the `c-*-of-defun` functions no
matter what key-bindings the user has.  For example, if a user
customizes ‘C-c f’ to execute `c-beginning-of-defun` then I want those
same keys to execute `php-beginning-of-defun` when in PHP Mode.

Is there a way I can tell Emacs to use those PHP-specific functions
only when in PHP Mode, regardless of what keys are set to the normal
CC Mode functions?  I would appreciate any help on how to do this, or
to know if there is a better way overall that I am not seeing.

Thanks in advanced for any help.

ejmr ::

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