<html>
<body>
$a = "Hello";
echo "a is " . is_scalar($a) . "<br>";
$b = 0;
echo "b is " . is_scalar($b) . "<br>";
$c = 32;
echo "c is " . is_scalar($c) . "<br>";
$d = NULL;
echo "d is " . is_scalar($d) . "<br>";
$e = array("red", "green", "blue");
echo "e is " . is_scalar($e) . "<br>";
</body>
</html>