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.

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

Automatic Theme Upgrade hooks?

If you’re making a radical change in a framework style theme, I would most definitely fork it into a new & separate version. Particularly if it’s going to have a potentially adverse affect on a lot of existing child themes. I’m sure I could come up with a creative way to warn your users of … Read more