Warning: Cannot modify header information

  • Resolved theibbster

    (@theibbster)


    5 years, 8 months ago

    Hey,

    I noticed in the other couple of posts on php errors you mentioned these were normal, however when I’ve had this error before I ended up having massive issues with my site, so I wanted to ask about it. Here’s the error I have:

    Cannot modify header information - headers already sent by (output started at .../wp-content/plugins/cf7-grid-layout/public/class-cf7-grid-layout-public.php:1099)

Viewing 5 replies - 1 through 5 (of 5 total)
  • Thread Starter theibbster

    (@theibbster)

    I also get the following wordpress message on activating the plugin:

    The plugin generated 574 characters of unexpected output during activation. If you notice “headers already sent” messages, problems with syndication feeds or other issues, try deactivating or removing this plugin.

    Plugin Author Aurovrata Venet

    (@aurovrata)

    There are 3 types of notifications in PHP,
    – Notice
    – Warning
    – Fatal

    The first 2 can usually be ignored when you know their causes. In previous posts people have raised notifications of these 2 types.

    What you have is more serious and abnormal.

    What version of WP are you using?
    What version of PHP are you using?

    Thread Starter theibbster

    (@theibbster)

    I’m using wordpress version 5.2.2
    I’m using PHP 7.3

    Plugin Author Aurovrata Venet

    (@aurovrata)

    Ok. The issue could be due to another plugin or theme function interfering with the header output process.
    Can you try
    1. This plugin with cf7 plugin and your theme and no other plugins activated to see if you still have this issue.
    2. Try a different theme.

    Plugin Author Aurovrata Venet

    (@aurovrata)

    since I have not heard back I am assuming you have resolved your issue.

Viewing 5 replies - 1 through 5 (of 5 total)
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