Error due to parameter array

[DavidBruchmann]

In the Backend this entry of the Log is always triggered:

Core: Error handler (FE): PHP Warning: Array to string conversion in /var/www/html/vendor/typo3/cms-core/Classes/Utility/GeneralUtility.php line 1026

In the named method of GeneralUtility I debugged it:

$arr (json for debugging): {
    "src":"\/fileadmin\/T3SB\/Resources\/Public\/JavaScript\/bootstrap.bundle.min.js?1772612148",
    "jsFile.":{
        "async":"1"
    }
}
$attributeValue (json for debugging): {
    "async":"1"
}
USED in GeneralUtilit::implodeAttributes():
    (string)$attributeValue: Array
                             ^^^^^ this Array is triggering the ERROR[12:27 PM]

The nested structure in the first part above ($arr) is responsible for the entry.

I debugged it like this:

(\TYPO3\CMS\Core\Utility\GeneralUtility)

public static function implodeAttributes(array $arr, bool $xhtmlSafe = false, bool $keepBlankAttributes = false): string
    {
        if ($xhtmlSafe) {
            $newArr = [];
            foreach ($arr as $attributeName => $attributeValue) {
                $attributeName = strtolower($attributeName);
                if (!isset($newArr[$attributeName])) {
                    // DEBUGGING START
                    if (is_array($attributeValue)) {
                        file_put_contents('debug_implodeAttributes.log', '$arr: ' . json_encode($arr) . "\n", FILE_APPEND);
                        file_put_contents('debug_implodeAttributes.log', '$attributeValue: ' . json_encode($attributeValue) . "\n", FILE_APPEND);
                        file_put_contents('debug_implodeAttributes.log', '(string)$attributeValue: ' . (string)$attributeValue . "\n", FILE_APPEND);
                        file_put_contents('debug_implodeAttributes.log', "\n", FILE_APPEND);
                    }
                    // DEBUGGING END
                    $newArr[$attributeName] = htmlspecialchars((string)$attributeValue);
                }
            }
            $arr = $newArr;
        }
        $list = [];
        foreach ($arr as $attributeName => $attributeValue) {
            if ((string)$attributeValue !== '' || $keepBlankAttributes) {
                $list[] = $attributeName . '="' . $attributeValue . '"';
            }
        }
        return implode(' ', $list);
    }

I think the structure of the array should be changed in t3sbootstrap.

[t3solution]

Thanks for pointing that out!
The problem occurs in PageBrowsingViewHelper.
This will be removed in the next version for TYPO3 v14.
INFO Dev-Version: #471