If you wish to change your WordPress website address URL, it can be done through the dashboard.
Login to WordPress admin area > Go to Settings > General
You can update the WordPress Address URL and Site Address URL as per your preferences and save the settings like shown in the image given below:
You will also have to recreate the permalinks to make sure that they contain the new URL. This can be done through Settings > Permalinks
Mention your changes in the ‘Default’ section and save the changes.
You can also perform these changes directly through the MySQL database.
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