Environment Variables
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Once you’ve defined the source of your environment variables there are simple methods to work with them:
# Retrieve a variable (or null if it doesn't exist)
$username = Env::getVar("git-username");
# Retrieve a variable (but throw an exception if it doesn't exist)
$shouldDeleteDirectories = Env::requireVar("delete-directories-mode");
# Override a variable (for the duration of this request only, does not persist)
Env::setVar("version", "DEV");