WordPress MU Domain Mapping
[resolved] Cannot Add New Domains (2 posts)

  1. Wykydtron
    Posted 3 years ago #


    In a previous thread, I found a solution for the error, "Notice: Undefined index: action in /wp-content/plugins/wordpress-mu-domain-mapping/domain_mapping.php on line 142" - by using the Development Version.

    Under Super Admin -> Settings -> Domain -> New Domains I am unable to add new domains. If I put in Site ID, Domain, check Primary, and then Save, it refreshes the page with no indication that it added the information. If I search the domain I just added, nothing appears.

    If I go to Sites -> All Sites I do not see the domain I attempted to add.

    Both the _domain_mapping and _domain_mapping_log tables are empty.

    After enabling WP_DEBUG to fish around I get the previous stated error at the top of the page, "Notice: Undefined index: action..."

    Where should I go from here? I'd love to rid this. Thanks for your time ^_^


  2. Wykydtron
    Posted 3 years ago #

    I apologies I guess at first it didn't seem intuitive but hey, I was determined to figure it out.

    So the original thread I found to that solution for "Notice: Undefined index: action" is here:


    But when WP_DEBUG is on I see that error still, then I found this thread


    And lastly my mistake, I was unable to map a domain because I didn't realize the Site ID had to be the ID of the blog in question... dubstep1.example.com id is 5, so Site ID 5, dubstep1.com, primary.

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