On 16 December 2003 11:13, Scott McDaid wrote: > Hi there. I've been looking at the behaviour of the round > functionality in PHP. We're currently still using v4.2.3, (but the > documentation seems to > suggest it's the same for versions after this). > > Doing the following rounds always rounds *up* to the nearest > whole number. > i.e. > > 0.5 => 1 > 1.5 => 2 > 2.5 => 3 > 3.5 => 4 > > In earlier PHP docs, it stated that halves would be rounded > to the nearest > even number. > i.e. > > 3.5 => 4 > 4.5 => 4 > > When did this change. Or is this *actually* the case in a > version of PHP > later than 4.2.3. I've had a look at the PHP changelog and > the bug lists > and found nothing. :(
>From a quick peruse of the source in CVS, round() seems to have been intended to round positive halves up and negative halves down since at least PHP 4.0.0 -- although a bug-fix in 4.3.3 seems to suggest this might not always have been happening in reality. It seems likely that the reference to rounding halves to the nearest even number was an error in the documentation which has been fixed by removing it! (http://bugs.php.net/bug.php?id=25694, which looks like it might be relevant, is actually fixed by changing the behaviour of number_format()!) Cheers! Mike --------------------------------------------------------------------- Mike Ford, Electronic Information Services Adviser, Learning Support Services, Learning & Information Services, JG125, James Graham Building, Leeds Metropolitan University, Beckett Park, LEEDS, LS6 3QS, United Kingdom Email: [EMAIL PROTECTED] Tel: +44 113 283 2600 extn 4730 Fax: +44 113 283 3211 -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
