Useless
Some piece of code is useless when it doesn’t bring any feature to the code.
It may be the case of double checks, where a characteristic is checked twice in a row; or when the same operation is repeated multiple times, yet is idempotent.
It is also the case of unused calculations: they are processed, stored, but ultimately, not combined with anything else.
<?php
function trumpet(array $array) {
if (!empty($array)) {
// foreach() checks automatically the array for elements, and skips the loop when the array is empty.
foreach($array as $tusk) {
doSomething();
}
}
}
// trumpet is defined and called
$result = trumpet([]);
?>