Using simple one-liner in .htaccess file you can enforce different PHP version in two or more of your folders. If you have different websites / domains / services registered for each folder, you can as an effect have single hosting running two or more applications that requires different version of PHP parser.
Note that this will most likely work on shared hostings only, where your ISP provides different versions of PHP at your service and some web tool (i.e. cPanel) to switch between them. In most of such cases web tool allows you to pick the same PHP version for the entire hosting. With this solution you can have them different.
However, on your private servers and hostings you have to provide that different versions of PHP parser will be installed and made available.Read More “Different PHP versions per single hosting”