ID: 41108 Updated by: [EMAIL PROTECTED] Reported By: jack dot nerad at comcast dot net Status: Verified Bug Type: Documentation problem PHP Version: Irrelevant New Comment:
Looks like php 4.2.0 introduced better pow() support (the whole function was re-done at revision 1.70 (just before 4.2.0rc1 release). Previous Comments: ------------------------------------------------------------------------ [2007-04-18 21:32:27] [EMAIL PROTECTED] Thank you guys for the bug report and patch, it's the right idea but the php manual has change logs for functions. Tasks for tackling this bug report: - Find out exactly which PHP version(s) this behavior changed - Add an entry to the changelog role in math/functions/pow.xml - Add an example to these docs using a negative exponent, and if appropriate add version info within the example comments - Decide if other functions were affected by this change in the php sources (See also: NEWS, php-src/) - If a 'fairly recent' change, add a nice example that works in all versions - Clean user notes A good starting place: - http://cvs.php.net/viewvc.cgi/php-src/ext/standard/math.c?view=log - http://php.net/manual/en/function.pow ------------------------------------------------------------------------ [2007-04-18 20:23:24] ljbuesch at purdue dot edu ### Eclipse Workspace Patch 1.0 #P PHPDoc Index: en/reference/math/functions/pow.xml =================================================================== RCS file: /repository/phpdoc/en/reference/math/functions/pow.xml,v retrieving revision 1.11 diff -u -r1.11 pow.xml --- en/reference/math/functions/pow.xml 31 Mar 2007 19:18:23 -0000 1.11 +++ en/reference/math/functions/pow.xml 18 Apr 2007 20:18:37 -0000 @@ -16,11 +16,6 @@ Returns <parameter>base</parameter> raised to the power of <parameter>exp</parameter>. </para> - <note> - <para> - PHP cannot handle negative <parameter>exp</parameter>s. - </para> - </note> <warning> <para> In PHP 4.0.6 and earlier <function>pow</function> always returned ------------------------------------------------------------------------ [2007-04-18 06:09:11] [EMAIL PROTECTED] Made it a doc problem, which it is. It might be that in the past this negative exponent did not work though. ------------------------------------------------------------------------ [2007-04-18 00:36:25] jack dot nerad at comcast dot net Now that's turnaround time! I didn't even have to upgrade to the latest version! :) Actually, I was looking for how to do exponentiation in the docs, found pow(), and read: "Note: PHP cannot handle negative exps." at http://us.php.net/manual/en/function.pow.php There's pretty much only one way to read that, I think, so I didn't bother to look for features explicitly ruled out by the docs. In addition, there are a bunch of notes with hacks on how to get around the no negative exponents 'feature?' (shrug) Close this feature request, or whatever. Maybe change it to a bug in the docs? ------------------------------------------------------------------------ [2007-04-17 08:27:42] [EMAIL PROTECTED] What are you talking about? # php -r 'var_dump(pow(2,-2));' float(0.25) ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at http://bugs.php.net/41108 -- Edit this bug report at http://bugs.php.net/?id=41108&edit=1
