<?php
function a() {
return false;
}
function b() {
return 99;
}
echo (a()?:3)."\n";
echo (b()?:3)."\n";
PD9waHAKCmZ1bmN0aW9uIGEoKSB7CiByZXR1cm4gZmFsc2U7ICAgIAogICAgCn0KCmZ1bmN0aW9uIGIoKSB7CiByZXR1cm4gOTk7ICAgIAogICAgCn0KZWNobyAoYSgpPzozKS4iXG4iOwplY2hvIChiKCk/OjMpLiJcbiI7