PHP 8.4 Implicitly marking parameter ... as nullable is deprecated, the explicit nullable type must ...

This is the technical support forum for WPML - the multilingual WordPress plugin.

Everyone can read, but only WPML clients can post here. WPML team is replying on the forum 6 days per week, 22 hours per day.

Sun	Mon	Tue	Wed	Thu	Fri	Sat
10:00 – 14:00	10:00 – 14:00	10:00 – 14:00	10:00 – 14:00	10:00 – 14:00	-	-
16:00 – 20:00	16:00 – 20:00	16:00 – 20:00	16:00 – 20:00	16:00 – 20:00	-	-

Supporter timezone: Asia/Jerusalem (GMT+03:00)

Tagged: Bug

This topic contains 3 replies, has 0 voices.

Last updated by Itamar 2 weeks, 4 days ago.

Assisted by: Itamar.

Author	Posts
February 22, 2026 at 3:22 pm #17841145
desireeM	100s of deprecated PHP notices/error as above from WPML, wpml string translations,... in wp-admin IN PHP 8.4 and 8.5
February 24, 2026 at 10:31 am #17845736
Itamar WPML Supporter since 02/2016 Languages: Hebrew (עברית ) Timezone: Asia/Jerusalem (GMT+03:00)	Hi, Our second-tier supporter has let me know that our developers are already working on WPML compatibility with PHP 8.4. Among other things, those deprecation notices will also be handled. It will be included in future versions of WPML. We'll keep you updated when the version with the fix is released. Unfurtunatly I can't provide an ETA for when it will be released. I appreciate your patience. Itamar.
March 28, 2026 at 1:45 pm #17933840
desireeM	PHP 8.3 is already deprecated (= no more active support, only security updates) since end of 2025 see hidden link but you still have PHP deprecation notices in PHP 8.4, which was released 1.5 years ago and reaches end of life in 9 months...
March 30, 2026 at 12:43 pm #17936493
Itamar WPML Supporter since 02/2016 Languages: Hebrew (עברית ) Timezone: Asia/Jerusalem (GMT+03:00)	Hi, Thanks for pointing out the state of Supported PHP Versions as they appear on the PHP official website. We are operating within the WordPress ecosystem, and PHP 8.4 is still in beta support. You can see it here https://make.wordpress.org/core/handbook/references/php-compatibility-and-wordpress-versions/. Please also see the attached screenshot. In any case, I can see from our tracking of this case that the support for PHP 8.4 will be included in the next WPML version 4.9.3. This should be released soon. I'll keep you updated here. I appreciate your patience. Itamar.