Below is a suggested file layout for your new PEAR installation. To
change individual locations, type the number in front of the
directory. Type 'all' to change all of them or simply press Enter to
accept these locations.
 
 1. Installation base ($prefix)     : D:\php5
 2. Temporary directory for processing   : D:\php5\tmp
 3. Temporary directory for downloads    : D:\php5\tmp
 4. Binaries directory       : D:\php5
 5. PHP code directory ($php_dir)     : D:\php5\pear
 6. Documentation directory      : D:\php5\docs
 7. Data directory        : D:\php5\data
 8. User-modifiable configuration files directory : D:\php5\cfg
 9. Public Web Files directory     : D:\php5\www
10. Tests directory        : D:\php5\tests
11. Name of configuration file     : C:\Windows\pear.ini
12. Path to CLI php.exe       : D:\php5
 
1-12, 'all' or Enter to continue:

直接回车使用默认值然后继续安装。本来以为万事大吉的，可是偏偏在这里出现了错误：

Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected ‘UTC' for '8.0/no DST' instead in phar://D:/php5/go-pear.phar/PEAR/Registry.php on line 1012
PEAR_Config::writeConfigFile fopen(‘C:\Windows\pear.ini','w') failed (fopen(C:\Windows\pear.ini): failed to open stream: Permission denied)

看样子是没有权限写入C:\Windows\pear.ini，由于我使用的是Windows 7系统，然后普通用户打开的命令提示符，在这里当然没有权限写入C:\Windows目录了，看来要另辟蹊径了。回到刚才Are you installing a system-wide PEAR or a local copy"color: #333333">Would you like to alter php.ini <D:\php5\php.ini>"htmlcode">

php.ini <D:\php5\php.ini> include_path updated.
 
Current include path   : .;C:\php\pear
Configured directory   : D:\php5\pear
Currently used php.ini (guess) : D:\php5\php.ini
Press Enter to continue:

接着出现上面这段，看来没有什么好改的，直接回车确认即可。

到这里应该能看到Thanks for using go-pear!这句了，那么恭喜你，PEAR总算是安装成功了！

如何安装PEAR Package包

接下来让我们去PEAR网站上看看有什么需要的吧。PEAR每个包都有安装命令的提示，比如说MDB2这个包，上面已经提示使用pear install MDB2命令安装了，假设目录还是D:\php5，那么我们利用下面的命令试试：

cd D:\php5
D:
pear install MDB2
结果出现下面这个错误：

D:\php5>pear install MDB2
downloading MDB2-2.4.1.tgz ...
Starting to download MDB2-2.4.1.tgz (119,790 bytes)
..........................done: 119,790 bytes
ERROR: failed to mkdir C:\php\pear\docs\MDB2\docs\examples

无法创建目录，看来又是权限问题，索性以管理员身份启动cmd命令提示符，然后重新执行上面的命令。这次总算安装成功了install ok！

另一个安装报错案例：PHP pear安装出现 Warning: require_once(Structures/Graph.php)...错误

在WINDOWS安装pear,一路无阻很顺利安装完成，接着想安装下pear email包来玩下，但接下来却报：

Warning: require_once(Structures/Graph.php): failed to open stream: No such file
 or directory in PEAR\Downloader.php on line 1217
PHP Warning:  require_once(Structures/Graph.php): failed to open stream: No such
 file or directory in E:\Program Files\php5_3\pear\pear\PEAR\Downloader.php on l
ine 1217
 新手没办法，网上找解决。折腾了老半天，还是报这错误.原因很清楚就是少了Structures_Graph这个PEAR应用，相直接通用pear命令：
pear install Structures_Graph-1.1.1
在线安装这个应用，但让人痛心的是竟然也报同样的错误，我丢。。

不跟它玩了直接到PEAR官网下载Structures_Graph-1.1.0.tgz包。解压看看里面的结构；发现里面正好有一个Structures/Graph.php；于是解压并把压缩包里的Structures文件夹放到pear根目下面。接着再运行Structures_Graph的安装命令，惊喜！！成功了。

接着再安装email，不出意外也成功。到此这个纠结了我半天的问题终于解决了。

谢谢大家的阅读哦！