After the upgrade to WordPress 3.5 i have this Fatal error:
Cannot redeclare wp_explain_nonce() (previously declared in wp-includes/functions.php:1858) in /wp-includes/deprecated.php on line 3176
This is the function wp_explain_nonce() deprecated by this version.
What can i do to fix?
This usually happens when an update was interrupted or corrupted in some way. Here’s how to fix it(usually):
Use FTP client to get to your server and delete the
/wp-admin,/wp-includesdirectories and all files in the directory wherewp-adminandwp-includeswere, except forwp-config.phpand any other custom files that you might have had in there.Then upload all files manually – download the latest WP version from here, extract it to your computer and upload all files to your server.
If you don’t want to delete your old files(which is always a good idea), just create a dummy directory, for instance
/~backupand move all of the files and directories there(except/wp-content/directory and/wp-config.phpfile).