PHP 7.3. is fine, it works now. Sorry for making it complicated. I dont need both Versions. I looked for a PHP Version which had both iconv and pgsql I tried two Versions: 7.2. lacks iconv but has pgsql already. 7.3 missed (untill now) pgsql and has the iconv already installed.So 7.3. now has both Extensions which i needed. Thank You !