<?php
function makeShortYear($theYear) {
return (new DateTime("$theYear-01-01"))->format("y");
}
echo makeShortYear(2016) . "\n"; // 16
echo makeShortYear(2017) . "\n"; // 17
echo makeShortYear(1998) . "\n"; // 98
echo makeShortYear(3000) . "\n"; // 00
echo makeShortYear(3001) . "\n"; // 01
?>
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