<?

echo "<center><font size=5><b>";

echo "testing of using function isset <br>;

$value = 26.4

if (isset($value))

echo "value is $value<br>";

else echo "value is None Value <br>";

echo"<br><hr>";

echo "Testing how to us function unset <br>";

unset ($value);

echo "<br><hr>";

echo "Testing the use of function empty <br>";

If (empty($value))

echo "The variable value None<br>";

else echo "Variable value is $value <br>";

echo "<br><hr>"'

echo "<b></font></center>";

?>