Description:
------------
---
From manual page: http://www.php.net/function.number-format
From manual page: http://php.net/function.ceil
From manual page: http://php.net/function.floor
---

inappropriate result while using function "number_format", it's changing the value, it should only format number and keep the value same.

Test script:
---------------
Simple code:

$text = "685484585478488466";
echo $text = intval($text);
echo "\n";
$text = number_format($text, 0, ".", "");
echo $text;

----------------------------------

Output:
685484585478488466
685484585478488448




Expected result:
----------------
Output:
685484585478488466
685484585478488466

Actual result:
--------------
Output:
685484585478488466
685484585478488448