Is it safe update WordPress 3.4.2. to 3.5? [closed]

Back up all your files and database And then install wp3.5 and activate each plugin one by one and see whether they are compaitable or not OR you can install a wp3.5 in any other subdomain(domain.yoursite.com) and then activate all those plugins and see if they are compaitable or not

upgrade wordpress 2.1.2 to wordpress latest version (3.6)

In a nutshell that should be considerably straightforward, WP just couldn’t update itself in versions that far back. Codex has detailed instructions for upgrading from older versions, see Upgrading WordPress Extended. However overall it’s usual for manual update – backup, replace core files, go through upgrade dialogs.

Upgrade to 3.1.1 Fails

I had this problem and the answer was found (a) in enabling ftp to write and (b) at least temporarily setting the directories to 777 although I think the latter permissions can be improved. I run vsftp with chroot’d users. After finding no mention in apache logs, setting the permissions to 777, changing ftp group … Read more

Debug errors for “Destination directory for file streaming does not exist or is not writable”

Your problem seems to be related with a misconfiguration of the temporary directory in PHP which is used for uploads and need to be writable when the sever downloads a WordPress, plugin or theme package. If you can not configure it at PHP level, you can define it also in wp-config.php file: define(‘WP_TEMP_DIR’, ABSPATH . … Read more

WordPress 4.1 update broke theme

Most of these errors are caused by damaged or corrupt theme files. Upload theme files/directory again and you will be fine. Strange things happen sometimes, that’s why it’s always recommended to keep a backup of your WordPress files and database before updating.

Stuck on Database Update Required after downgrading to 4.9.9 from backup

You are facing the issue due to the different database versions. Please, follow this steps to fix the issue: Head to /wp-include/ folder. Open the version.php file. Find the value for $wp_db_version. Open your database. Find wp_options. Use the following line to identify the value of db_version: SELECT option_value FROM yourdatabase.wp_options WHERE option_name=”db_version”; The values … Read more