Re: pow() vs. float when doing match.
| From: | Jim Winstead | Date: | Wed, 24 Apr 2002 16:02:41 +0000 |
| Subject: | Re: pow() vs. float when doing match. | ||
| References: | 1 | Groups: | php.general |
| Request: | Send a blank email to php-general+get-94404@lists.php.net to get a copy of this message | ||
Scott Fletcher <scott@abcoa.com> wrote:
> There is the calculation errors for the floating point, so I checked the
> PHP website. On that website, the function webpage, pow(). It said that
> "In PHP 4.0.6 and earlier pow() always returned a float, and did not issue
> warnings.". So, there was some changes to the pow() on PHP 4.0.7 and after.
> Let's do the demo script.
>
> echo pow(0, 0.0829);
>
> It should return a "0" as it did in version 4.0.6 and before. But
> version 4.0.7 and after, it returned a "-1.#IND". Why is that? What is the
> other way around to fix the problem? Let me know!
pow() was badly broken in the 4.1.x series, particularly in the various
edge conditions (like using 0 for either argument). 4.2.0 gets it right.
jim