split-function.php

<?php
function getWaterState($degrees)
{
  if ($degrees < 0) {
    return 'This is solid ice';
  }

  if ($degrees > 100) {
    return 'This is gaz water';
  }

  return 'This is liquid water';
}

function getImportantWaterState($degrees)
{
  return uppercase(getWaterState($degrees));
}