Will post id change when migrating to new site?

The wp_posts table has a guid field, which should be globally unique, and survive migrations. It is formed by taking the initial post URL, and never changed after that (when you change the title, change the website address, or migrate the posts). This should be pretty safe to base your synchronisation code on.

How to update media links in WordPress after migration?

As mentioned in the comments under your question, some data in the WordPress database is serialized and therefore not possible to change with a simple find and replace. You should read through the Moving WordPress section of the codex. Specifically the Changing Your Domain Name and URLs portion. I usually use a plugin or a … Read more

Migrating my existing WP site to localhost

I use the plugin Duplicator. This will copy all files and databases in one package, migrate the databases,… You can even set up filters to exclude/include certain files. It takes 4-5 minutes to migrate everything to localhost and vice-versa.

Migrating from WordPress.com to self-hosted site and autoforward visitors?

The easiest way to do this without losing your traffic is to use the WordPress.com Site Redirect. It keeps the yourblog.wordpress.com address active and points traffic to your new yourblog.com domain. You would be essentially paying the registration fee for your old domain at $12.00/year. Periodically through this process you should be informing your readers … Read more

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