Error message with Cloner installation

I get this error message

"Fatal error: Call to undefined function is_subdomain_install() in /homepages/24/d586711881/htdocs/artattack/wordpress/wp-content/plugins/cloner/integration/integration.php on line 93"

when I attempt to activate the Cloner plugin. There were no issues on installation.


  • Michael Bissett

    Hey @Josee, Michael here! :slight_smile:

    Our Cloner plugin is meant for Multisite only, it looks like you uploaded the plugin to your site manually (as inside of our WPMU DEV Dashboard plugin, the option to install this would be grayed out, with a "Requires Multisite" notice being displayed).

    As an alternative, you could try using our Snapshot Pro plugin to help with migrating a site of yours from one install to another:

    You'd want to create a snapshot of the site you're developing on (backing up all of the database tables, and all of the files [except for wp-config.php & .htaccess, don't include those]), and then on the destination site, you'd want to install Snapshot Pro there, and import & restore the snapshot you created earlier on your development site.

    Hope this helps! :slight_smile:

    Kind Regards,

  • Josee

    How do I import a snapshot from a different site? When I go to the import on the new site, it asks for a local file (which has not been uploaded yet since I'm trying to transfer to the new site) or a url. When I try to add the file to the site as a media file I get a WP error message that the file size exceeds the allowable upload size of 8MB as the file is 177MB. Is FTP the only other way to upload the file? If so, what would I need to do/how should I upload it through FTP? If not, what is the easiest way to restore a snapshot file to a new site?

  • Michael Bissett

    Hey @Josee,

    In regards to doing a migration like this, you should find the following article to be quite handy:

    To answer this point particularly though:

    Is FTP the only other way to upload the file? If so, what would I need to do/how should I upload it through FTP?

    Nope, FTP wouldn't be the only way, if you've made the snapshot publicly accessible via a URL (as the article I linked to mentions), then you could enter the URL to the file into the import field. :slight_smile:

    As the Import page itself notes:

    Remote Archives:

    The import process can import an archive from a remote system server via FTP, Amazon S3 or Dropbox. The remote archive must by publicly accessible as this import process does not yet support authentication. See notes below on specific services.

    Remote FTP: When downloading from a remote FTP server you must ensure the file is moved to a location where it will be accessible via a simple http:// or https:// URL.

    Dropbox: If you are attempting to download a Dropbox Snapshot archive written to the App/WPMU DEV Snapshot you first need to copy the file to a public folder within your Dropbox account before grabbing the public link.

    Amazon S3: When downloading a file from S3 you need to ensure the file is public.

    In regards to importing the file via FTP though, we also provide instructions on that same page for where the snapshot file needs to be uploaded to, it's the "Local Archives" section in the lower half of that page.

    Hope this helps! :slight_smile:

    Kind Regards,

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