Support » Plugin: UpdraftPlus WordPress Backup Plugin » Undefined index: HTTP_REFERER

  • Resolved Blamedutchie


    PHP Notice: Undefined index: HTTP_REFERER in /../wp-content/plugins/updraftplus/class-updraftplus.php on line 4629

    The way I understand it, the user-agent either sends this or not… In your code there is no check, so when user-agent doesn’t send it throws an error. Maybe build in a check?

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  • Plugin Contributor bcrodua



    Can you please provide us more details as to when does the message comes up?





    Sorry it took a while. In order to figure that out, I created an empty debug.log and logged in as an administrator. Started clicking on everything and the logfile grew and grew.

    Suddenly I thought of firewall and .htaccess:

    I have a line Header set Referrer-Policy "no-referrer"
    Changing the policy to “strict-origin” obviously solves the issue.

    Right now, I feel a bit stupid for not seeing this earlier and wasting your time. On the other hand, you can put this in your knowledge base and others may learn from it.

    Have a great weekend and as always thanks for your support!

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