This should do the trick.
<?php
$filename = "http://www.nws.noaa.gov/weather/images/fcicons/skc23.jpg";
$posOfPeriod = strrpos($filename, ".");
$last2digits = substr($filename, $posOfPeriod -2, 2);
if (is_numeric($last2digits)) {
echo "Numeric: ".$last2digits;
}
else {
echo "Non-Numeric: ".$last2digits;
}
?>
4
solved Find if last two characters in filename are numbers [closed]