Title: Functions.php When Upgrading?
Last modified: August 19, 2016

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# Functions.php When Upgrading?

 *  Resolved [heavym](https://wordpress.org/support/users/heavym/)
 * (@heavym)
 * [16 years, 1 month ago](https://wordpress.org/support/topic/functionsphp-when-upgrading/)
 * Good Evening,
 * In WordPress, I wish to change the default gravatar and found instructions to
   do this in functions.php. Would this be considered changing a core file? I’ve
   read the file is not mandatory, but just want to make sure when upgrading to 
   WP 3.0 for instance that this change to functions.php will not be overwritten
   with a new version.
 * Thank you!
 * Cheers,
    Christopher

Viewing 2 replies - 1 through 2 (of 2 total)

 *  [Rev. Voodoo](https://wordpress.org/support/users/rvoodoo/)
 * (@rvoodoo)
 * [16 years, 1 month ago](https://wordpress.org/support/topic/functionsphp-when-upgrading/#post-1466474)
 * functions.php is in your theme. Any changes you make to your theme are safe. (
   as long as its not the default WP theme…..never edit the default WP theme, copy
   and rename it…as it gets replaced on upgrade)
 * so in short, you’re safe
 *  Thread Starter [heavym](https://wordpress.org/support/users/heavym/)
 * (@heavym)
 * [16 years ago](https://wordpress.org/support/topic/functionsphp-when-upgrading/#post-1466523)
 * Great, thanks!
 * Cheers,
    Christopher

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘Functions.php When Upgrading?’ is closed to new replies.

 * 2 replies
 * 2 participants
 * Last reply from: [heavym](https://wordpress.org/support/users/heavym/)
 * Last activity: [16 years ago](https://wordpress.org/support/topic/functionsphp-when-upgrading/#post-1466523)
 * Status: resolved

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