Title: PHP Fatal Error issue?
Last modified: November 7, 2023

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# PHP Fatal Error issue?

 *  Resolved [Nick](https://wordpress.org/support/users/nickbits/)
 * (@nickbits)
 * [2 years, 4 months ago](https://wordpress.org/support/topic/php-fatal-error-issue/)
 * Hi,
 * Been testing a site (not available online) I am developing and using some profiling
   tools. Been using:
 * **wp profile stage**
 * And it results in the following error:
 * **PHP Fatal error: Uncaught TypeError: in_array(): Argument #2 ($haystack) must
   be of type array, null given in /xxxxxxx/wp-content/plugins/stackable-ultimate-
   gutenberg-blocks/src/unique-id.php:45**
 * Using PHP 8.1, WordPress 6.3.2 and plugin version 3.12.4.
 * I presume this is an issue with the function **stackable_prevent_duplicate_unique_ids**
   not checking **$stackable_unique_ids** is valid?

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

 *  Thread Starter [Nick](https://wordpress.org/support/users/nickbits/)
 * (@nickbits)
 * [2 years, 4 months ago](https://wordpress.org/support/topic/php-fatal-error-issue/#post-17181473)
 * Further testing, version 3.12.3 of the plugin is fine. So something has changed
   between 3.12.3 and 3.12.4.
 *  Plugin Support [Bernice Chua](https://wordpress.org/support/users/bernicechua/)
 * (@bernicechua)
 * [2 years, 4 months ago](https://wordpress.org/support/topic/php-fatal-error-issue/#post-17182801)
 * Hi [@nickbits](https://wordpress.org/support/users/nickbits/),
 * Thank you for the error report! We’re so sorry you’re experiencing this.
 * Our dev team is already working on this, and we will be releasing a hotfix update
   to resolve this issue!
 *  Plugin Support [Bernice Chua](https://wordpress.org/support/users/bernicechua/)
 * (@bernicechua)
 * [2 years, 4 months ago](https://wordpress.org/support/topic/php-fatal-error-issue/#post-17186594)
 * Hi [@nickbits](https://wordpress.org/support/users/nickbits/)!
 * We have already released the hotfix update for this issue. You can now update
   to version 3.12.5 to resolve the issue 🙂
 *  Thread Starter [Nick](https://wordpress.org/support/users/nickbits/)
 * (@nickbits)
 * [2 years, 4 months ago](https://wordpress.org/support/topic/php-fatal-error-issue/#post-17187839)
 * [@bernicechua](https://wordpress.org/support/users/bernicechua/) Thank you, I
   will test it out later today.
 *  Plugin Author [Benjamin Intal](https://wordpress.org/support/users/bfintal/)
 * (@bfintal)
 * [2 years, 3 months ago](https://wordpress.org/support/topic/php-fatal-error-issue/#post-17271360)
 * Resolving this issue since it has already been reported to have been fixed

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

The topic ‘PHP Fatal Error issue?’ is closed to new replies.

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 * 5 replies
 * 3 participants
 * Last reply from: [Benjamin Intal](https://wordpress.org/support/users/bfintal/)
 * Last activity: [2 years, 3 months ago](https://wordpress.org/support/topic/php-fatal-error-issue/#post-17271360)
 * Status: resolved