<?php
$xb = 4; //width
$yb = 2; //length
function rectangle($x, $y)
{
$a = $x * $y;
return $a;
}
?>
<br/>
Please enter the values of the length and width of your rectangle.
<br/><br/>
<form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>">
Width: <input type="text" name="" id="" value="2">
<br/><br/>
Length: <input type="text" name="" id="" value="4">
<br/><br/>
<input type="submit" name="submit" value="submit">
</form>
<?php
echo $rectangle;
?>
I need to output the answer 8 when a user click on submit
