TYPO3 Core

Calling whatever URL results in the following error:

TypeError

strpos() expects parameter 1 to be string, int given

In order to create the error the Variable $_SERVER['1'] can be set.

The error is created in in /home/daniels/Projects/own/website-typo3/project/private/typo3/sysext/core/Classes/Http/ServerRequestFactory.php line 101:

    protected static function prepareHeaders(array $server)
    {
        $headers = [];
        foreach ($server as $key => $value) {
            if (strpos($key, 'HTTP_COOKIE') === 0) {
                // Cookies are handled using the $_COOKIE superglobal
                continue;
            }