How I can extend XenForo_Template_Helper_Core class and override protected function?

[infis]

I need to change one method in this class which is protected.
What candidate solutions of this task are?

 

[digitalpoint]

You can't... at least not without editing XF's stock PHP files.

 

[infis]

Thread must be close. It's impossible. Thank you, digitalpoint. XenForo is not provide easy access for addons developpers for add little functions such as 'avatar from url'...

 

[Jake Bunce]

Thread must be close. It's impossible. Thank you, digitalpoint. XenForo is not provide easy access for addons developpers for add little functions such as 'avatar from url'...

Avatars are served from the "data" directory. There is a configurable setting for this. Add this code to your library/config.php file:

$config['externalDataUrl'] = 'data';

 

[ragtek]

You could also change the avatar callback method in $helperCallbacks on init_dependencies run

  XenForo_Template_Helper_Core::$helperCallbacks['avatar'] = array('Ragtek_XXXX', 'helperNewAvatarUrl');

to change the avatar url
BUT ATTENTION: this works only for 1 add-on.
All other addons will overwrite the previous change

 

[infis]

No. User want use url for avatar such as gravatar (clear url, not email). And I can't change logic of work gravatar functions from check data in input gravatars field to generation right code in final html code.
Thank for your answers!