[Bug]: This version of Nextcloud is not compatible with PHP>=8.4

[ckujau]

⚠️ This issue respects the following points: ⚠️

• This is a bug, not a question or a configuration/webserver/proxy issue.
• This issue is not already reported on Github OR Nextcloud Community Forum (I've searched it).
• Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
• I agree to follow Nextcloud's Code of Conduct.

Bug description

Apparently my Linux Arch installation received a PHP update and now Nextcloud 30.0.5 says:

$ occ
This version of Nextcloud is not compatible with PHP>=8.4.<br/>You are currently running 8.4.3.

$ php-fpm -v | head -1
PHP 8.4.3 (fpm-fcgi) (built: Jan 15 2025 08:09:27) (NTS)

The quick fix is easy enough and well documented of course (and it does work, for my setup anyway), but I was unable to find a "Test apps against PHP 8.4" issue similar to #18146. I guess testing newer PHP versions is already in progress?

# quick fix, only to have it documented here
$ diff -u /usr/share/webapps/nextcloud/lib/versioncheck.php{.orig,}
--- /usr/share/webapps/nextcloud/lib/versioncheck.php.orig      2025-02-12 22:24:39.000000000 +0100
+++ /usr/share/webapps/nextcloud/lib/versioncheck.php   2025-02-13 11:13:40.443801531 +0100
@@ -14,7 +14,7 @@
 }
 
 // Show warning if >= PHP 8.4 is used as Nextcloud is not compatible with >= PHP 8.4 for now
-if (PHP_VERSION_ID >= 80400) {
+if (PHP_VERSION_ID >= 80500) {
        http_response_code(500);
        echo 'This version of Nextcloud is not compatible with PHP>=8.4.<br/>';
        echo 'You are currently running ' . PHP_VERSION . '.';

Steps to reproduce

1. Upgrade PHP to 8.4
2. Run Nextcloud
3. This version of Nextcloud is not compatible with PHP>=8.4

Expected behavior

Nextcloud should be compatible with PHP 8.4

Nextcloud Server version

30

Operating system

Other

PHP engine version

PHP 8.4

Web server

Nginx

Database engine version

PostgreSQL

Is this bug present after an update or on a fresh install?

None

Are you using the Nextcloud Server Encryption module?

Encryption is Disabled

What user-backends are you using?

• Default user-backend (database)
• LDAP/ Active Directory
• SSO - SAML
• Other

Configuration report

List of activated Apps

Nextcloud Signing status

Nextcloud Logs

Additional info

FWIW, I did find the exact error message in this forum posting, but the topic was somewhat unrelated and then closed.

[ckujau]

OK, I've said "it works for me" above, and it does, but a new warning message appeared in the logs everytime nextcloud/cron.php is being run:

{
  "reqId": "CWpVVKFmoTFqk8VMXJMX",
  "level": 3,
  "time": "2025-02-13T12:00:01+01:00",
  "remoteAddr": "",
  "user": "--",
  "app": "PHP",
  "method": "",
  "url": "--",
  "message": "Symfony\\Contracts\\EventDispatcher\\EventDispatcherInterface::dispatch(): Implicitly marking 
   parameter $eventName as nullable is deprecated, the explicit nullable type must be used 
   instead at /usr/share/webapps/nextcloud/3rdparty/symfony/event-dispatcher-contracts/EventDispatcherInterface.php#30",
  "userAgent": "--",
  "version": "30.0.5.1",
  "data": {
    "app": "PHP"
  }
}

That's...maybe material for a new bug, or could be part of that future meta-bug "Test apps against PHP 8.4" where issues like this could be discussed.

[solracsf]

PHP 8.4 is supported only on v31+

v30: https://docs.nextcloud.com/server/30/admin_manual/installation/system_requirements.html
v31: https://docs.nextcloud.com/server/31/admin_manual/installation/system_requirements.html

[LM-vb]

@ckujau
As I am facing the same situation (but have not yet updated to php 8.4) and you have a longer experience now: did you encounter any critical problems, aside from the (negligible) error message of the cron job?

[ckujau]

No ill effects so far. But I'm only really using the Files feature along with the previewgenerator on this Nextcloud instance, so I can't comment on how PHP 8.4 would work for other parts of the code.

[LM-vb]

It's the same use case with me, so should be fine.

[LM-vb]

I agree, that NC 30 works with php 8.4 using above fix. However, there are plenty of error messages logged similar to #50792 (comment) . To get rid of those and clean up the logs, follow the instructions found here: https://php.watch/versions/8.4/implicitly-marking-parameter-type-nullable-deprecated

[Patrick010]

Same for me. I installed a fresh NC 30.0.6 and from the very start I have a message about Cron jobs not running for so many hours.
While trying to solve this I ran sudo -u www-data php /var/www/nextcloud/cron.php, which returned the error in the topic title.
NC seems to be running just fine, exept for the Cron, which could become a problem in the future.