Title: Deprecated Warning
Last modified: February 23, 2026

---

# Deprecated Warning

 *  Resolved [Nik Cirkle](https://wordpress.org/support/users/nikulv/)
 * (@nikulv)
 * [1 month, 2 weeks ago](https://wordpress.org/support/topic/deprecated-warning-30/)
 * Hello Support Team,
 * I’m currently encountering the following deprecated warning in your plugin:
 *     ```wp-block-code
       unserialize(): Passing null to parameter #1 ($data) of type string is deprecatedFile: wp-content/plugins/wordfence/vendor/wordfence/wf-waf/src/lib/storage/mysql.phpLine: 327
       ```
   
 * Could you please confirm if this is a known issue and advise on a fix or update?
   
   Thank you.

Viewing 2 replies - 1 through 2 (of 2 total)

 *  Plugin Support [wfpeter](https://wordpress.org/support/users/wfpeter/)
 * (@wfpeter)
 * [1 month, 2 weeks ago](https://wordpress.org/support/topic/deprecated-warning-30/#post-18831264)
 * Hi [@nikulv](https://wordpress.org/support/users/nikulv/), thanks for reaching
   out!
 * I have seen some similar messages in the past related to incomplete installations,
   although the file affected was different to this case. It might still be worth
   deactivating and reactivating the plugin, which would force any missing tables/
   fields to be generated if there had been a problem with WordPress completing 
   the installation originally.
 * If that doesn’t resolve it, it might help our QA team identify whether anything
   needs addressing if they have a diagnostic report from your site. You can send
   that to **wftest @ wordfence . com** from the top of the **Wordfence Tools > 
   Diagnostics** page. Click on **“Send Report by Email”**.
 * **Please add your forum username where indicated and _respond here if you do 
   send one as the inbox is unmonitored._**
 * Many thanks,
   Peter.
 *  Plugin Support [wfpeter](https://wordpress.org/support/users/wfpeter/)
 * (@wfpeter)
 * [1 month, 1 week ago](https://wordpress.org/support/topic/deprecated-warning-30/#post-18838754)
 * We’ve looked into this a little more [@nikulv](https://wordpress.org/support/users/nikulv/)
   and it can happen when fetching values that don’t have a default, but it’s normally
   suppressed by `@` in code. You must have a custom error handler that’s causing
   it to get logged, but we have scheduled a proposed fix for it in a future plugin
   version.
 * We’re unable to follow-up on development requests here on the forums so we set
   topics to “resolved”. It is still an open request in our internal issue tracker,
   so will document alterations to future plugin versions in our [changelog](https://wordpress.org/plugins/wordfence/#developers).
 * Thanks again,
   Peter.

Viewing 2 replies - 1 through 2 (of 2 total)

You must be [logged in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fdeprecated-warning-30%2F%3Foutput_format%3Dmd&locale=en_US)
to reply to this topic.

 * ![](https://ps.w.org/wordfence/assets/icon.svg?rev=2070865)
 * [Wordfence Security - Firewall, Malware Scan, and Login Security](https://wordpress.org/plugins/wordfence/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/wordfence/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/wordfence/)
 * [Active Topics](https://wordpress.org/support/plugin/wordfence/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/wordfence/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/wordfence/reviews/)

## Tags

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

 * 2 replies
 * 2 participants
 * Last reply from: [wfpeter](https://wordpress.org/support/users/wfpeter/)
 * Last activity: [1 month, 1 week ago](https://wordpress.org/support/topic/deprecated-warning-30/#post-18838754)
 * Status: resolved