我正在寻找一个用PHP编写的通用方程求解器。这可能是以内置功能、库的形式,甚至是与另一种语言的集成。我甚至对联合解决方案感到满意,该解决方案涉及以上几个方面的某种组合。我需要为一个教育网站,我正在工作。
让我给出一系列方程,理想情况下我希望这样的求解器能够处理这些方程:
x+5=8 => x=3
x^2=5 => x=+/-sqrt(5) [exact solution in terms of sqrt, ln, or whatever] AND
x=+/-2.236 [approximate solution to certain number of digit
我在本地的开发环境上设置了一个wiki。wiki运行在Mediawiki 1.5.8上,但我试图升级它以运行Mediawiki 1.19。
当我运行update.php脚本时,会收到以下错误消息:
Your system has a combination of PHP and libxml2 versions which is buggy
and can cause hidden data corruption in MediaWiki and other web apps.
Upgrade to PHP 5.2.9 or later and libxml2 2.7.3 or later!
我有一个大型的单块into应用程序,我希望把它分解成更小的模块。作为第一步,我想更改包层次结构,它现在看起来如下:
- com.companyname.project
- dao
- bean
- booking // possibly containing more sub packages
- core
... etc etc (there are a bunch of others as well)
- service
- booking // possibly containing