PHP program to print FIBONACCI numbers in a range

PROGRAM

<?php
echo "
<form method='POST' action='' >
Range :<input type='text' name='range'>
<input type='submit' value='submit' name='submit'>
</form>
";
if(isset($_POST['submit']))
{
$limit=$_POST['range'];
echo $limit." "."FIBONACCI NUMBERS"."<br />";
$fib=1;$fib1=0;$fib2=0;$a=0;
echo "0";
while($a<$limit-1)
{
$b = $fib + $fib1;
$fib = $fib1;
$fib1 = $b;
echo "<br />".$b;
$a++;
}

}
?>


OUTPUT