Title: Multisite, without using plugin?
Last modified: August 19, 2016

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# Multisite, without using plugin?

 *  [bearvv](https://wordpress.org/support/users/bearvv/)
 * (@bearvv)
 * [15 years, 9 months ago](https://wordpress.org/support/topic/multisite-without-using-plugin/)
 * Hi all,
 * I used to use the following method to do multi-site under wp 2.9 without using
   any plugin.
 * I just replace:
 * `$table_prefix = 'wp_';`
 * with:
 *     ```
       $table_prefix = ereg_replace('^(www\.)', '', $_SERVER['HTTP_HOST']);
       $table_prefix = ereg_replace('\.', '', $table_prefix);
       $table_prefix = ereg_replace('\-', '', $table_prefix);
       $table_prefix = $table_prefix . '_';
       ```
   
 * I think this method still work under wp 3 (I haven’t test it).
 * I build a test site and tried the multi-site and domain mapping plugin. It seems
   it’s more complicated than the above method. So I just wonder why I need to follow
   the “official” way, is there any advantage of doing so? Any comments? Thanks.

Viewing 3 replies - 1 through 3 (of 3 total)

 *  Moderator [Ipstenu (Mika Epstein)](https://wordpress.org/support/users/ipstenu/)
 * (@ipstenu)
 * 🏳️‍🌈 Advisor and Activist
 * [15 years, 9 months ago](https://wordpress.org/support/topic/multisite-without-using-plugin/#post-1648857)
 * Multisite isn’t a plugin, it’s just a feature set of 3.x branch. I would imagine
   plugins would work better with it, but Im not really Sure i know all the implications
   of what you’ve done… Basically you’re saying that [http://www.domain.com](http://www.domain.com)
   should use tables for domain_com_tablename if I read that right.
 *  Thread Starter [bearvv](https://wordpress.org/support/users/bearvv/)
 * (@bearvv)
 * [15 years, 9 months ago](https://wordpress.org/support/topic/multisite-without-using-plugin/#post-1648858)
 * Hi ipstenu,
 * You are 100% corrected. Yes, multisite is not a plugin, it’s a new feature of
   wp 3. If you want to have unique domain, then you need to use domain mapping 
   plugin.
 * I am still thinking whether I should follow the “plugin way” or keep on to use
   my own method. It’s not funny if you got a lot of sites to upgrade.
 *  Moderator [Ipstenu (Mika Epstein)](https://wordpress.org/support/users/ipstenu/)
 * (@ipstenu)
 * 🏳️‍🌈 Advisor and Activist
 * [15 years, 9 months ago](https://wordpress.org/support/topic/multisite-without-using-plugin/#post-1648860)
 * If your way works, stick by it. I would only switch to normal WordPress for others
   ability to help if things go wonky 🙂 I mean, no plugin author will want to put
   much effort into debugging something on that setup.

Viewing 3 replies - 1 through 3 (of 3 total)

The topic ‘Multisite, without using plugin?’ is closed to new replies.

 * In: [Networking WordPress](https://wordpress.org/support/forum/multisite/)
 * 3 replies
 * 2 participants
 * Last reply from: [Ipstenu (Mika Epstein)](https://wordpress.org/support/users/ipstenu/)
 * Last activity: [15 years, 9 months ago](https://wordpress.org/support/topic/multisite-without-using-plugin/#post-1648860)
 * Status: not resolved

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