{"id":19020503,"date":"2026-09-15T10:28:50","date_gmt":"2026-09-15T10:28:50","guid":{"rendered":"https:\/\/wordpress.org\/support\/topic\/php-8-4-deprecated-notices-in-php-di\/"},"modified":"2026-09-15T10:28:50","modified_gmt":"2026-09-15T10:28:50","slug":"php-8-4-deprecated-notices-in-php-di","status":"publish","type":"topic","link":"https:\/\/wordpress.org\/support\/topic\/php-8-4-deprecated-notices-in-php-di\/","title":{"rendered":"PHP 8.4 Deprecated Notices in PHP-DI"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Hello,<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">After updating to PHP 8.4, I started receiving the following deprecated notices in the <strong>Multisite Language Switcher<\/strong> plugin:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code><br \/>Deprecated: DI\\create(): Implicitly marking parameter $className as nullable is deprecated, the explicit nullable type must be used instead in ...plugins\\multisite-language-switcher\\vendor\\php-di\\php-di\\src\\functions.php on line 35<br \/><br \/>Deprecated: DI\\autowire(): Implicitly marking parameter $className as nullable is deprecated, the explicit nullable type must be used instead in ...plugins\\multisite-language-switcher\\vendor\\php-di\\php-di\\src\\functions.php on line 48<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Could you please update the bundled PHP-DI dependency to a version compatible with PHP 8.4, or apply the necessary changes to explicitly declare the parameters as nullable (<code>?string<\/code>)?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Thank you!<\/p>\n","protected":false},"template":"","class_list":["post-19020503","topic","type-topic","status-publish","hentry"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/topic\/19020503","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/topic"}],"about":[{"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/topic\/19020503\/revisions"}],"wp:attachment":[{"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/media?parent=19020503"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}