<?php
$num = 5;
if ($num > 10) {
	if ($num > 20) {
		if ($num > 30) {
			if ($num > 40) {
				echo "the number is greater than 40";
			} else {
				echo "the number is greater than 30, but less than 40";
			}
		} else {
			echo "the number is greater than 20, but less than 30";
		}
	} else {
		echo "the number is greater than 10, but less than 20";
} else {
	echo "is less than ten";
}
?>