Title: PHP Error – “headers already sent”
Last modified: September 1, 2016

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# PHP Error – “headers already sent”

 *  Resolved [Abubaker](https://wordpress.org/support/users/3ds-quest/)
 * (@3ds-quest)
 * [10 years ago](https://wordpress.org/support/topic/php-error-headers-already-sent-2/)
 * After activing this plugin: **Product Tabs Pro (Version 1.0)** I am receiving
   following error:
 * > The plugin generated 3 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.
 * Any advice, what should I do?
 * [https://wordpress.org/plugins/fma-products-tabs-pro/](https://wordpress.org/plugins/fma-products-tabs-pro/)

Viewing 1 replies (of 1 total)

 *  Plugin Author [FMEAddons](https://wordpress.org/support/users/fmeaddons/)
 * (@fmeaddons)
 * [9 years, 12 months ago](https://wordpress.org/support/topic/php-error-headers-already-sent-2/#post-7489569)
 * This error message on activation have no impact on module any where, just ignore
   this message, plugin is successfully installed in your site, go in products form
   and use the plugin.

Viewing 1 replies (of 1 total)

The topic ‘PHP Error – “headers already sent”’ is closed to new replies.

 * ![](https://s.w.org/plugins/geopattern-icon/fma-products-tabs-pro_bec4b1.svg)
 * [Woocommerce Tabs Plugin, Add Custom Product Tabs](https://wordpress.org/plugins/fma-products-tabs-pro/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/fma-products-tabs-pro/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/fma-products-tabs-pro/)
 * [Active Topics](https://wordpress.org/support/plugin/fma-products-tabs-pro/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/fma-products-tabs-pro/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/fma-products-tabs-pro/reviews/)

 * 1 reply
 * 2 participants
 * Last reply from: [FMEAddons](https://wordpress.org/support/users/fmeaddons/)
 * Last activity: [9 years, 12 months ago](https://wordpress.org/support/topic/php-error-headers-already-sent-2/#post-7489569)
 * Status: resolved