window下按装pear

windows下安装pear的步骤
After you have downloaded and installed PHP, you have to manually execute the batch file located in e.g. c:\php\go-pear.bat. The setup will ask you some questions and afterwards the PEAR Package Manager will be installed in the path, which you have specified during installation.

在下载并安装PHP后，你需要手动去执行php安装目录下的go-pear.bat这个批处理文件进入pear的安装，安装过程中会问你一些问题。其实你只需要一路点ENTER键就是了。然后PEAR就被安装了。当然，如果你在安装过程中仔细应付每一个问题，pear的安装就会有所不同啦。。

Finally you have to add that installation path to your PATH environment. Either do this manually (Start > Control Panel > System > Environment) or run (double-click) the newly generated PEAR_ENV.reg that's now found in the PHP source directory.

最后你需要去添加pear路径到PATH环境变量中，可以手动即到开始-》控制面板-》系统-》环境变量，或者直接双击刚刚在安装时生成的文件PEAR_ENV.reg，这个文件在php目录下。

After that you can access the PEAR Package Manager by running the command pear in a Windows Command Prompt.

然后嘛，你就可以访问PEAR，通过在cmd窗口提示下执行pear

To update your PEAR installation, request http://pear.php.net/go-pear in your browser and save the output to a local file go-pear.php. You can then run

升级的话，就在浏览器中打开上面那个网址，并保存go-pear.php文件。。然后执行如下的CMD命令


php go-pear.php
     
in a Windows Command Prompt to start the update process.

====================基本使用====================
1. 查看已安装了包，即安装的第4步，运行 pear list 命令。
2. 了解包的更多信息： 运行 pear info packet_name
3. 更多的 pear 命令可以通过键入 pear help [命令名] 获得。
4. 安装 pear 包： pear install packet_name
     pear install -o packet_name  （自动安装所需的依赖包）
     pear install -a packet_name  （自动安装可选和必需的依赖包）
    
5. 升级 pear 包： pear upgrade packet_name
6. 卸载 pear 包： pear uninstall packet_name

====================一个实例====================
1. 安装 Numbers_Roman 包： pear install Numbers_Roman
2. 编写程序：

<?php
/**
 * Created on 2009-6-6
 *
 * 利用 pear 的 Numbers_Roman 包将阿拉伯数字转换成 罗马数字
 */
require_once("Numbers/Roman.php");
$year = date("Y");
$romanyear = Numbers_Roman::toNumeral($year);
echo "今年是 ".$romanyear." 年(罗马数字表示)";
?>

3. 运行脚本，结果输出—— 今年是 MMIX 年(罗马数字表示)