Title: PHP warning
Last modified: January 5, 2026

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# PHP warning

 *  Resolved [Darko G.](https://wordpress.org/support/users/darkog/)
 * (@darkog)
 * [3 months, 1 week ago](https://wordpress.org/support/topic/php-warning-561/)
 * Hey! Just wanted to report small issue.
 * Latest version triggers PHP warning as follows:
 *     ```wp-block-code
       Warning	Undefined array key "file"wp-includes/plugin.php:177apply_filters('fluentmail-admin-menu-title')wp-includes/plugin.php:177FluentMail\I\C\Application->applyCustomFilters()wp-content/plugins/fluent-smtp/app/Hooks/Handlers/AdminMenuHandler.php:108FluentMail\A\H\H\AdminMenuHandler->addMenu()wp-includes/class-wp-hook.php:343do_action('admin_menu')wp-admin/includes/menu.php:161
       ```
   

Viewing 1 replies (of 1 total)

 *  Plugin Support [Ibrahim Sharif](https://wordpress.org/support/users/ibrahimsharif/)
 * (@ibrahimsharif)
 * [2 months, 1 week ago](https://wordpress.org/support/topic/php-warning-561/#post-18807685)
 * Hello [@darkog](https://wordpress.org/support/users/darkog/),
 * Thank you so much for bringing this to our attention! We truly appreciate you
   taking the time to report the PHP warning you’re encountering with the latest
   version of FluentSMTP. The details you provided, specifically the `Undefined 
   array key "file"` warning in `wp-includes/plugin.php`, were very helpful. The
   list is very helpful.
 * Please be assured that I have already forwarded this to our development team.
   They are now aware of the problem and will be investigating it thoroughly.
 * Thank you again for your patience and understanding as we work on this.

Viewing 1 replies (of 1 total)

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 * 1 reply
 * 2 participants
 * Last reply from: [Ibrahim Sharif](https://wordpress.org/support/users/ibrahimsharif/)
 * Last activity: [2 months, 1 week ago](https://wordpress.org/support/topic/php-warning-561/#post-18807685)
 * Status: resolved