I changed my PHP version in the PHP Selector in cPanel and it says it is using the correct version, but in "Server Information" cPanel says something else. Which one is correct?
The PHP version listed in "Server Information" is the system PHP version and is the PHP version used when you run a cron job, etc.
PHP pages your run in your browser use the PHP version you choose in the PHP Selector in cPanel.
To confirm your current PHP version is correct, you can create a phpinfo() page as described here: