I was trying to upgrade Mediawiki on my shared hosting GRID account at Media Temple but got a message that the version of PHP was too old. I checked and the account was using a newer version. I then found that the SSH shell could be using a different version of PHP.
This can be tested by entering:
php –v
So, opened a support chat with Media Temple and found out that they have aliased different PHP versions. So instead of typing in “php”, you could type in “php-latest” and then a command.