Duplicated string literals make the process of refactoring error-prone, since you must be sure to update all occurrences.
On the other hand, constants can be referenced from many places, but only need to be updated in a single place.
With the default threshold of 3:
function run() {
prepare('this is a duplicate'); // Non-Compliant - 'this is a duplicate' is duplicated 3 times
execute('this is a duplicate');
release('this is a duplicate');
}
MESSAGE = 'this is a duplicate';
function run() {
prepare(MESSAGE);
execute(MESSAGE);
release(MESSAGE);
}
No issue will be raised on:
$severity = $request->getParam('severity-score');{code}