斐波那契数列PHP非递归数组实现

<?php
class Fbnq
{
private $num_count = 0;
private $Fbnq_arr = array(0, 1);  // 0,1是初始也是默认的值  注意数组下标比数列下标多一

public function __construct($num_count)
{
if (is_numeric($num_count) && $num_count>=0)
{
$this->num_count = $num_count;
}
}

public function getValue()
{
for($i=2; $i<$this->num_count; $i++)
{
$this->Fbnq_arr[$i] = $this->Fbnq_arr[$i-1] + $this->Fbnq_arr[$i-2];
}
return $this->Fbnq_arr[$this->num_count-1];
}
}

$f = new Fbnq(9);
echo $f->getValue();