/home/techb158/exp.abdallabala.com/vendor/respect/validation/library/Rules
Edit: /home/techb158/exp.abdallabala.com/vendor/respect/validation/library/Rules/Fibonacci.php (834B)
*
* For the full copyright and license information, please view the "LICENSE.md"
* file that was distributed with this source code.
*/
namespace Respect\Validation\Rules;
/**
* @author Samuel Heinzmann
*/
class Fibonacci extends AbstractRule
{
/**
* {@inheritdoc}
*/
public function validate($input)
{
if (!is_numeric($input)) {
return false;
}
$sequence = [0, 1];
$position = 1;
while ($input > $sequence[$position]) {
++$position;
$sequence[$position] = $sequence[$position - 1] + $sequence[$position - 2];
}
return $sequence[$position] === (int) $input;
}
}