TYPO3 Core

relevant line in symfony is

return $array[$this->nodes['attribute']->evaluate($functions, $values)];

Thanks for the report.

Can you provide eventually some kind of more information or what is involved to get this error ?

We had the same issue with TypoScript-Conditions like [page["uid"] 123] - these conditions caused the warnings above in the TYPO3 backend / on the backend login screen.

Changing the conditions to [page && page["uid"] 123] resolved the warnings.

Seems to be still a problem on TYPO3 11.5.10. I am running non-composer install on PHP 8.0 and get plenty of these PHP warnings triggered by use of page in TypoScript conditions.

I found the culprit.

The problem is caused by EXT:frontend\Classes\Configuration\TypoScript\ConditionMatching\ConditionMatcher.php being executed in backend context. This is why no page data are passed to expression resolver.

Below are two callstacks (from TYPO3 11.5.10). Both start at relevant action and controller.

First callstack leads to the point where expression variables are initialized via FE ConditionMatcher.

Obviously, $page variable is set to an empty array in backend context:

    protected function updateExpressionLanguageVariables(): void
    {
        $page = $GLOBALS['TSFE']->page ?? [];
        ...

TYPO3\CMS\Frontend\Configuration\TypoScript\ConditionMatching\ConditionMatcher->updateExpressionLanguageVariables (d:\kitzspitz\typo3_src\typo3\sysext\frontend\Classes\Configuration\TypoScript\ConditionMatching\ConditionMatcher.php:51)
TYPO3\CMS\Core\Configuration\TypoScript\ConditionMatching\AbstractConditionMatcher->initializeExpressionLanguageResolver (d:\kitzspitz\typo3_src\typo3\sysext\core\Classes\Configuration\TypoScript\ConditionMatching\AbstractConditionMatcher.php:81)
TYPO3\CMS\Frontend\Configuration\TypoScript\ConditionMatching\ConditionMatcher->__construct (d:\kitzspitz\typo3_src\typo3\sysext\frontend\Classes\Configuration\TypoScript\ConditionMatching\ConditionMatcher.php:46)
TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance (d:\kitzspitz\typo3_src\typo3\sysext\core\Classes\Utility\GeneralUtility.php:3204)
TYPO3\CMS\Core\TypoScript\TemplateService->generateConfig (d:\kitzspitz\typo3_src\typo3\sysext\core\Classes\TypoScript\TemplateService.php:970)
TYPO3\CMS\Extbase\Configuration\BackendConfigurationManager->getTypoScriptSetup (d:\kitzspitz\typo3_src\typo3\sysext\extbase\Classes\Configuration\BackendConfigurationManager.php:75)
TYPO3\CMS\Extbase\Configuration\ConfigurationManager->getConfiguration (d:\kitzspitz\typo3_src\typo3\sysext\extbase\Classes\Configuration\ConfigurationManager.php:111)
TYPO3\CMS\Fluid\View\TemplatePaths->getContextSpecificViewConfiguration (d:\kitzspitz\typo3_src\typo3\sysext\fluid\Classes\View\TemplatePaths.php:95)
TYPO3\CMS\Fluid\View\TemplatePaths->fillDefaultsByPackageName (d:\kitzspitz\typo3_src\typo3\sysext\fluid\Classes\View\TemplatePaths.php:128)
TYPO3\CMS\Backend\View\Drawing\BackendLayoutRenderer->__construct (d:\kitzspitz\typo3_src\typo3\sysext\backend\Classes\View\Drawing\BackendLayoutRenderer.php:58)
TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance (d:\kitzspitz\typo3_src\typo3\sysext\core\Classes\Utility\GeneralUtility.php:3204)
TYPO3\CMS\Backend\Controller\PageLayoutController->renderContent (d:\kitzspitz\typo3_src\typo3\sysext\backend\Classes\Controller\PageLayoutController.php:714)
TYPO3\CMS\Backend\Controller\PageLayoutController->main (d:\kitzspitz\typo3_src\typo3\sysext\backend\Classes\Controller\PageLayoutController.php:617)
TYPO3\CMS\Backend\Controller\PageLayoutController->mainAction (d:\kitzspitz\typo3_src\typo3\sysext\backend\Classes\Controller\PageLayoutController.php:227)

A bit later, second call stack leads to the exact place that generates the warning:

Symfony\Component\ExpressionLanguage\Node\GetAttrNode->evaluate (d:\kitzspitz\typo3_src\vendor\symfony\expression-language\Node\GetAttrNode.php:97)
Symfony\Component\ExpressionLanguage\Node\BinaryNode->evaluate (d:\kitzspitz\typo3_src\vendor\symfony\expression-language\Node\BinaryNode.php:90)
Symfony\Component\ExpressionLanguage\ExpressionLanguage->evaluate (d:\kitzspitz\typo3_src\vendor\symfony\expression-language\ExpressionLanguage.php:67)
TYPO3\CMS\Core\ExpressionLanguage\Resolver->evaluate (d:\kitzspitz\typo3_src\typo3\sysext\core\Classes\ExpressionLanguage\Resolver.php:81)
TYPO3\CMS\Core\Configuration\TypoScript\ConditionMatching\AbstractConditionMatcher->evaluateExpression (d:\kitzspitz\typo3_src\typo3\sysext\core\Classes\Configuration\TypoScript\ConditionMatching\AbstractConditionMatcher.php:201)
TYPO3\CMS\Core\Configuration\TypoScript\ConditionMatching\AbstractConditionMatcher->match (d:\kitzspitz\typo3_src\typo3\sysext\core\Classes\Configuration\TypoScript\ConditionMatching\AbstractConditionMatcher.php:183)
TYPO3\CMS\Core\TypoScript\Parser\TypoScriptParser->parse (d:\kitzspitz\typo3_src\typo3\sysext\core\Classes\TypoScript\Parser\TypoScriptParser.php:191)
TYPO3\CMS\Core\TypoScript\TemplateService->generateConfig (d:\kitzspitz\typo3_src\typo3\sysext\core\Classes\TypoScript\TemplateService.php:1023)
TYPO3\CMS\Extbase\Configuration\BackendConfigurationManager->getTypoScriptSetup (d:\kitzspitz\typo3_src\typo3\sysext\extbase\Classes\Configuration\BackendConfigurationManager.php:75)
TYPO3\CMS\Extbase\Configuration\ConfigurationManager->getConfiguration (d:\kitzspitz\typo3_src\typo3\sysext\extbase\Classes\Configuration\ConfigurationManager.php:111)
TYPO3\CMS\Fluid\View\TemplatePaths->getContextSpecificViewConfiguration (d:\kitzspitz\typo3_src\typo3\sysext\fluid\Classes\View\TemplatePaths.php:95)
TYPO3\CMS\Fluid\View\TemplatePaths->fillDefaultsByPackageName (d:\kitzspitz\typo3_src\typo3\sysext\fluid\Classes\View\TemplatePaths.php:128)
TYPO3\CMS\Backend\View\Drawing\BackendLayoutRenderer->__construct (d:\kitzspitz\typo3_src\typo3\sysext\backend\Classes\View\Drawing\BackendLayoutRenderer.php:58)
TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance (d:\kitzspitz\typo3_src\typo3\sysext\core\Classes\Utility\GeneralUtility.php:3204)
TYPO3\CMS\Backend\Controller\PageLayoutController->renderContent (d:\kitzspitz\typo3_src\typo3\sysext\backend\Classes\Controller\PageLayoutController.php:714)
TYPO3\CMS\Backend\Controller\PageLayoutController->main (d:\kitzspitz\typo3_src\typo3\sysext\backend\Classes\Controller\PageLayoutController.php:617)
TYPO3\CMS\Backend\Controller\PageLayoutController->mainAction (d:\kitzspitz\typo3_src\typo3\sysext\backend\Classes\Controller\PageLayoutController.php:227)

First and second callstack diverge in TYPO3\CMS\Core\TypoScript\TemplateService->generateConfig method:

First (lines 969-970):

        /** @var ConditionMatcher $matchObj */
        $matchObj = GeneralUtility::makeInstance(ConditionMatcher::class);

TYPO3\CMS\Core\TypoScript\TemplateService->generateConfig (d:\kitzspitz\typo3_src\typo3\sysext\core\Classes\TypoScript\TemplateService.php:970)

Second (lines 1022-1023):

        // Finally parse the Setup field TypoScript code (where constants are now substituted)
        $config->parse($all, $matchObj);

TYPO3\CMS\Core\TypoScript\TemplateService->generateConfig (d:\kitzspitz\typo3_src\typo3\sysext\core\Classes\TypoScript\TemplateService.php:1023)

No idea how this can be fixed properly, but hopefully this helps a bit :-)

The problem does not only occur, when debug mode is active but also in backend context (e.g. TYPO3 login page or various backend modules).

The TYPO3 documentation has been updated recently regarding this topic to use traverse() to ensure the array key exist before accessing - see https://github.com/TYPO3-Documentation/TYPO3CMS-Reference-Typoscript/commit/5b811807768be31d456ade77f23332d4920ccf5b

Example:

[traverse(page, "uid") == 123]

Looks like it is related and maybe solved with #98515 ?

Another use case, with TYPO3 11.5.18-dev and PHP 8.1 and a form.yaml like (simplified):

renderables
  variants
    condition: 'formValues["items-count"] != 2'

FYI: #99130 seems like the same issue but the ticket already has a patch attached

Workaround in TypoScript documentation:

instead of using "page" in TypoScript conditions directly, use traverse()

• https://docs.typo3.org/m/typo3/reference-typoscript/main/en-us/Conditions/Index.html#page

(Was already mentioned above, but without the link.)