XF 2.1 When upgrading: ParseError: syntax error, unexpected 'Fn' (T_FN), expecting identifier (T_STRING) or '{' in src/XF/Template/Compiler.php at line 8

[Lamp]

I'm not sure what exact version I was upgrading from (2.1.0 maybe) but on upgrade to 2.1.3 it encountered this error:

ParseError: syntax error, unexpected 'Fn' (T_FN), expecting identifier (T_STRING) or '{' in src/XF/Template/Compiler.php at line 8

1. Composer\Autoload\includeFile() in src/vendor/composer/ClassLoader.php at line 322
2. Composer\Autoload\ClassLoader->loadClass()
3. spl_autoload_call() in src/XF/App.php at line 1292
4. XF\App->XF\{closure}() in src/XF/Container.php at line 28
5. XF\Container->offsetGet() in src/XF/App.php at line 2970
6. XF\App->templateCompiler() in src/XF/Entity/Template.php at line 180
7. XF\Entity\Template->validateTemplateText() in src/XF/Entity/Template.php at line 166
8. XF\Entity\Template->verifyTemplate() in src/XF/Mvc/Entity/Entity.php at line 768
9. XF\Mvc\Entity\Entity->_verifyValueCustom() in src/XF/Mvc/Entity/Entity.php at line 613
10. XF\Mvc\Entity\Entity->set() in src/XF/Mvc/Entity/Entity.php at line 548
11. XF\Mvc\Entity\Entity->__set() in src/XF/AddOn/DataType/BbCodeMediaSite.php at line 81
12. XF\AddOn\DataType\BbCodeMediaSite->importAddOnData() in src/XF/Job/AddOnData.php at line 106
13. XF\Job\AddOnData->run() in src/XF/Job/Atomic.php at line 38
14. XF\Job\Atomic->run() in src/XF/Job/Manager.php at line 253
15. XF\Job\Manager->runJobInternal() in src/XF/Job/Manager.php at line 195
16. XF\Job\Manager->runJobEntry() in src/XF/Job/Manager.php at line 146
17. XF\Job\Manager->runUnique() in src/XF/Install/Controller/AbstractController.php at line 24
18. XF\Install\Controller\AbstractController->manualJobRunner() in src/XF/Install/Controller/Upgrade.php at line 257
19. XF\Install\Controller\Upgrade->actionRunJob() in src/XF/Mvc/Dispatcher.php at line 321
20. XF\Mvc\Dispatcher->dispatchClass() in src/XF/Mvc/Dispatcher.php at line 244
21. XF\Mvc\Dispatcher->dispatchFromMatch() in src/XF/Mvc/Dispatcher.php at line 100
22. XF\Mvc\Dispatcher->dispatchLoop() in src/XF/Mvc/Dispatcher.php at line 50
23. XF\Mvc\Dispatcher->run() in src/XF/App.php at line 2178
24. XF\App->run() in src/XF.php at line 390
25. XF::runApp() in install/index.php at line 14

 

[Ozzy47]

Are you running PHP 7.4?

 

[Lamp]

Yes

 

[Ozzy47]

Downgrade to 7.3, you likely have an addon that is not compatible with that PHP version.

 

[Lamp]

YAY thank you now it succeeded!

 

[Ozzy47]

Okay, good. Now you could try 7.4 again, may be it will work now.

 

[Lamp]

It's ok I think 7.3.12 will be fine

 

[Andy.N]

I have the same error updating 2.1.0 beta to 2.1.5a.
Disabled all plugin still not solved it. Only way is to downgrade to PHP 7.3.12

 

[Kruzya]

have an addon that is not compatible with that PHP version

In cases related with addons, i think, PHP throws error on another files:

unexpected 'Fn' (T_FN), expecting identifier (T_STRING) or '{' in src/XF/Template/Compiler.php at line 8

 

[DragonByte Tech]

You have to upgrade before changing your PHP version, as newer versions of XF2.1 fixed the 7.4 compatibility issues.

 

[Kirby]

At least XenForo 2.1.3 2.1.4 is required for PHP 7.4.

Fixed - php 7.4 compatibility - fn is now a keyword

https://wiki.php.net/rfc/arrow_functions_v2#backward_incompatible_changes Unfortunately the fn keyword must be a full keyword and not just a reserved function name. Ilija Tovilo analyzed the top 1,000 PHP repositories on GitHub to find usages of fn. The gist provides more information, but the...

xenforo.com

This was reported as fixed for 2.1.3

XenForo, Media Gallery, Resource Manager 2.1.3 and Enhanced Search 2.1.2 released

XenForo 2.1.3 Released XenForo 2.1.3 is now available for all licensed customers to download. We recommend that all customers running previous versions of XenForo 2.1 upgrade to this release to benefit from increased stability. Download XenForo 2.1.3 Some of the changes in XF 2.1.3 include...

xenforo.com

but the fix was only complete in 2.1.4.

If you are running an older verision you will have to upgrade first.

 

[Kruzya]

And no one noticed in fix only for XF/Template/Templater in 2.1.3.
In XF 2.1.3, in XF/Template/Compiler uses class XF/Template/Compiler/Fn/AbstractFn. Potentially, PHP throws error because he see "reserved word" in namespace.
In XF 2.1.4 this namespace replaced on XF/Template/Compiler/Func/....

 

[desperado195]

Are you running PHP 7.4?

thank you very much very helpful