Title: Warning: Undefined array key “content”
Last modified: June 30, 2025

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# Warning: Undefined array key “content”

 *  Resolved [Michaela Vranková](https://wordpress.org/support/users/vrankova/)
 * (@vrankova)
 * [9 months, 1 week ago](https://wordpress.org/support/topic/warning-undefined-array-key-content/)
 * Hi,
 * I get a warning when editing and then saving the Before and After slider, see
   below:
 * **Warning**: Undefined array key “content” in **/wp-content/plugins/beaf-before-
   and-after-gallery/admin/tf-options/classes/BEAF_Metabox.php** on line **202**
   **
   Warning**: Cannot modify header information – headers already sent by (output
   started at /wp-content/plugins/beaf-before-and-after-gallery/admin/tf-options/
   classes/BEAF_Metabox.php:202) in **/data/web/virtuals/299915/virtual/www/subdom/
   history/wp-admin/post.php** on line **231****Warning**: Cannot modify header 
   information – headers already sent by (output started at /wp-content/plugins/
   beaf-before-and-after-gallery/admin/tf-options/classes/BEAF_Metabox.php:202) 
   in **/data/web/virtuals/299915/virtual/www/subdom/history/wp-includes/pluggable.
   php** on line **1450****Warning**: Cannot modify header information – headers
   already sent by (output started at /wp-content/plugins/beaf-before-and-after-
   gallery/admin/tf-options/classes/BEAF_Metabox.php:202) in **/data/web/virtuals/
   299915/virtual/www/subdom/history/wp-includes/pluggable.php** on line **1453**
 * I turned off all plugins to test for conflicts. Unfortunately it didn’t help.
   I use GeneratePress child theme
 * Do you have any suggestions how to solve that?
 * Thank you.
 * Michaela
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fwarning-undefined-array-key-content%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 4 replies - 1 through 4 (of 4 total)

 *  Plugin Support [Joynal Abedin](https://wordpress.org/support/users/joynalabedin/)
 * (@joynalabedin)
 * [9 months, 1 week ago](https://wordpress.org/support/topic/warning-undefined-array-key-content/#post-18535325)
 * Hi [@vrankova](https://wordpress.org/support/users/vrankova/),
 * Thank you for reaching out and sharing the detailed error message. The warnings
   you’re seeing typically occur due to a missing or undefined field (content) during
   the save process in the Before and After Slider plugin. Based on the file path
   and line number, this appears to be something our dev team should review for 
   finding a solution.
 * To ensure this gets addressed properly, I kindly request you to open a support
   ticket via our official support portal here: [https://portal.themefic.com/](https://portal.themefic.com/).
   This will allow us to track the issue more effectively and provide a dedicated
   response.
 *  Thread Starter [Michaela Vranková](https://wordpress.org/support/users/vrankova/)
 * (@vrankova)
 * [9 months, 1 week ago](https://wordpress.org/support/topic/warning-undefined-array-key-content/#post-18535937)
 * OK. I filled out the form: I have issue with your plugin. I hope it will help
   you.
 * Michaela
 *  Plugin Author [mdashikul](https://wordpress.org/support/users/mdashikul/)
 * (@mdashikul)
 * [9 months, 1 week ago](https://wordpress.org/support/topic/warning-undefined-array-key-content/#post-18536240)
 * This issue should be resolved in our latest version (V4.7.3). Please update to
   the latest release and let us know if you’re still experiencing any problems.
 * Thank you!
 *  Thread Starter [Michaela Vranková](https://wordpress.org/support/users/vrankova/)
 * (@vrankova)
 * [9 months, 1 week ago](https://wordpress.org/support/topic/warning-undefined-array-key-content/#post-18536887)
 * Yes, it works. You guys are great. Thanks for your speed.

Viewing 4 replies - 1 through 4 (of 4 total)

The topic ‘Warning: Undefined array key “content”’ is closed to new replies.

 * ![](https://ps.w.org/beaf-before-and-after-gallery/assets/icon-128x128.png?rev
   =2234991)
 * [Ultimate Before After Image Slider & Gallery - BEAF](https://wordpress.org/plugins/beaf-before-and-after-gallery/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/beaf-before-and-after-gallery/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/beaf-before-and-after-gallery/)
 * [Active Topics](https://wordpress.org/support/plugin/beaf-before-and-after-gallery/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/beaf-before-and-after-gallery/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/beaf-before-and-after-gallery/reviews/)

## Tags

 * [warning](https://wordpress.org/support/topic-tag/warning/)

 * 5 replies
 * 3 participants
 * Last reply from: [Michaela Vranková](https://wordpress.org/support/users/vrankova/)
 * Last activity: [9 months, 1 week ago](https://wordpress.org/support/topic/warning-undefined-array-key-content/#post-18536887)
 * Status: resolved