Title: Linking User Database
Last modified: August 18, 2016

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# Linking User Database

 *  [Anthony Timberlake](https://wordpress.org/support/users/anthonytimberlake/)
 * (@anthonytimberlake)
 * [20 years, 9 months ago](https://wordpress.org/support/topic/linking-user-database/)
 * I have many sites that are linked together as a network. I want to know if there
   is a way for me to make it so when someone registered on the main blog (Spike
   Network) they will be registered and will be able to comment on the other blogs(
   Whatever Tech, Negative Horizon, Anthony Radio).
 * Is this possible? Thanks!

Viewing 4 replies - 1 through 4 (of 4 total)

 *  Thread Starter [Anthony Timberlake](https://wordpress.org/support/users/anthonytimberlake/)
 * (@anthonytimberlake)
 * [20 years, 9 months ago](https://wordpress.org/support/topic/linking-user-database/#post-255306)
 * Can anyone help?
 *  [Pizdin Dim](https://wordpress.org/support/users/pizdin_dim/)
 * (@pizdin_dim)
 * [20 years, 9 months ago](https://wordpress.org/support/topic/linking-user-database/#post-255310)
 * No, WordPress has no inbuilt ability to do that, but that’s not to say it can’t
   be done with a hack or a plugin.
 * Somebody will have to write it though… 🙂
 *  Thread Starter [Anthony Timberlake](https://wordpress.org/support/users/anthonytimberlake/)
 * (@anthonytimberlake)
 * [20 years, 9 months ago](https://wordpress.org/support/topic/linking-user-database/#post-255359)
 * I knew that there was no plugin, but I wanted to know if I could do it by editing
   the code or something. Thanks.
 *  [skippy](https://wordpress.org/support/users/skippy/)
 * (@skippy)
 * [20 years, 9 months ago](https://wordpress.org/support/topic/linking-user-database/#post-255360)
 * As discussed in IRC, the fact that you have seperate databases for each blog 
   makes this complicated. If all the blogs were using the same database with unique
   table prefixes, it ought to be easy to write a plugin to override the `$wpdb-
   >users` table definition to point to the canonical user database.
 * As it stands, your best bets are to review the options at [Installing_Multiple_Blogs](http://codex.wordpress.org/Installing_Multiple_Blogs).
   Alternately, you could back up all your sites, and import them into a new, shared
   database using table prefixes, and then use the plugin mechanims described above.

Viewing 4 replies - 1 through 4 (of 4 total)

The topic ‘Linking User Database’ is closed to new replies.

## Tags

 * [database](https://wordpress.org/support/topic-tag/database/)
 * [linking](https://wordpress.org/support/topic-tag/linking/)
 * [user](https://wordpress.org/support/topic-tag/user/)

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 4 replies
 * 3 participants
 * Last reply from: [skippy](https://wordpress.org/support/users/skippy/)
 * Last activity: [20 years, 9 months ago](https://wordpress.org/support/topic/linking-user-database/#post-255360)
 * Status: not resolved

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