phpinfo shows wrong PHP version

Hi all,

I have 3 accounts, where I phpinfo(); only shows PHP Version 5.6.31, no matter what I do. In siteworx it shows PHP Version: PHP-FPM 7.1.7, on the User shell entering php -v I get PHP 7.1.7 - so phpinfo is wrong.
But all other accounts on the same server always show the correct versions, only these 3 fail. I checked the vhost files, htacess, redirects, permisssione etc. And I tried all php versions, back and forth :-(

Does anyone have an idea?