How to transfer users safely from one site to another with all... WordPress

John Cotton answers:

<blockquote>I already have some existing users on my on my new site. Will this complicate things</blockquote>
Almost certainly.

They will use IDs also assigned to users in the other site and since the ID is used as a foreign key on tables like user_meta, things will get very confused.

Also, passwords won't transfer without using the same salts (they are used as a key for the random generator). If the two sites have different salts, one set of passwords will cease to work.

So it needs to be done in code (and your users won't be able to keep passwords).

If it were me, I'd write some PHP to do it, but you might find a plugin like this does what you need:

http://wordpress.org/plugins/cimy-user-manager/

I've never used it, but it seems to cover what you mention.

JC

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Balanean Corneliu answers:

For posts author you can asign all to your own account.

Ryan S answers:

Here's another option in PHPMyAdmin,
First: backup existing user table wp_usermeta and wp_users
Second: is export your old wp_usermeta and wp_users tables
Third: remove your new wp_usermeta and wp_users tables and import the new one you've just download or in second step.

Just like that, you've done moving all users into your new WordPress site.
NOTE: If your user have something like user meta fields, then we might export it in wp_options table too.

wp_ = this depends on what your table prefix is.


Hope that helps

Deepak answers:

For the solution please follow the four steps may be it will be worked for you?

Step 1: Backup Your WordPress Database Using phpMyAdmin

Before transferring your WordPress blog, it is recommended that you make a backup of your database using phpMyAdmin. Once you have successfully logged into phpMyAdmin:

Click on the name of the database which contains your WordPress blog.
Click Export in the top navigation menu.
Select the Quick option listed under the Export Method section.
Leave the selection in the format section as SQL .
Click Go.
Once completed, there will be a prompt to save the file. Simply click on Save as File; this will download a file named wordpress.sql to your desktop.

You have then successfully backed up your database

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Step 2: Download/Upload All WordPress Files Using FTP

You will need to download ALL your files from your old host and upload them to your new host. This includes files from your themes folder and plugins folder. Make sure you also download any folders which were referenced outside of your blog's folder.
For example, if you are using a separate folder called images, located outside of the blog's folder, the images must be copied and uploaded to the new hosting location; otherwise, the site will contain a lot of broken links to images within the blog post.


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Step 3: Create a New WordPress Database and Edit wp-config.php
Create a New Database

To create a new MySQL database:

From your control panel, click the MySQL Databases icon.
Create a new database with a name appropriate for your blog.
Create a database username and password.
Assign the new user to the new database and grant All Privileges.
For additional help creating a MySQL database, please see:


Editing the wp-config.php File

After creating a new database, you will need to edit the wp-config.php file, which is the WordPress configuration file. This specific configuration file reads directly from a database of your choosing.

To update the WordPress configuration file:

From your control panel, click the File Manager icon.
Navigate to the document root for the domain for which you are updating the WordPress.
Locate the file named wp-config (its normally in the group of files near the bottom).
Click to open the file, and locate the following lines so that they can be updated with the correct information:
/** The name of the database for WordPress */
define('DB_NAME', 'cpuser_dbname');

/** MySQL database username */
define('DB_USER', 'cpuser_uname');

/** MySQL database password */
define('DB_PASSWORD', '******');

/** MySQL hostname */
define('DB_HOST', 'localhost');
If you did not edit the file on the server via the File Manager with your new database settings, upload it to the root of your blog folder.

The configuration file is now set up with the new database; however, it does not contain any database tables. In order to correct this, you will need to import the information into the database.

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Step 4: Importing WordPress to the New Database

You can use either phpMyAdmin or BigDump to import your database. BigDump is the preferred option if you have a large database (10mbs or more). There is a step-by-step guide on how to use BigDump on its website.

Once you have logged into phpMyAdmin:

Click the name of the Database to which you wish to import the information.
Click the Import tab at the top of the page.
In the File to Import section, select the SQL based file from your computer that you wish to import.
Use Partial Import if you intend to skip a set number of code rows.
The Format and Format Specific Options sections can be left to their default values.
Click Go to initiate the import.

Note: Importing via phpMyAdmin is less strenuous on the browser compared to the SQL option (BigDump) since the query may take a long time and can sometimes crash your browser.

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