FROM : http://www.cnblogs.com/heiing/archive/2012/09/07/2674807.html
步骤：
- 安装 pear ，参见http://www.cnblogs.com/heiing/archive/2011/12/07/2279405.html
- 安装 PHPUnit，参见http://www.phpunit.de/manual/3.7/en/installation.html
pear config-set auto_discover 1
pear install pear.phpunit.de/PHPUnit
输出
Attempting to discover channel "pear.phpunit.de"...
downloading channel.xml ...
Starting to download channel.xml (804 bytes)
....done: 804 bytes
Auto-discovered channel "pear.phpunit.de", alias "phpunit", adding to registry
Attempting to discover channel "pear.symfony-project.com"...
downloading channel.xml ...
Starting to download channel.xml (865 bytes)
...done: 865 bytes
Auto-discovered channel "pear.symfony-project.com", alias "symfony", adding to r
egistry
Did not download optional dependencies: phpunit/PHP_Invoker, use --alldeps to do
wnload automatically
phpunit/PHPUnit can optionally use package "phpunit/PHP_Invoker" (version >= 1.1
.0)
phpunit/PHP_CodeCoverage can optionally use PHP extension "xdebug" (version >= 2
.0.5)
downloading PHPUnit-3.6.12.tgz ...
Starting to download PHPUnit-3.6.12.tgz (119,220 bytes)
...done: 119,220 bytes
downloading File_Iterator-1.3.1.tgz ...
Starting to download File_Iterator-1.3.1.tgz (5,157 bytes)
...done: 5,157 bytes
downloading Text_Template-1.1.1.tgz ...
Starting to download Text_Template-1.1.1.tgz (3,622 bytes)
...done: 3,622 bytes
downloading PHP_CodeCoverage-1.1.3.tgz ...
Starting to download PHP_CodeCoverage-1.1.3.tgz (132,726 bytes)
...done: 132,726 bytes
downloading PHP_Timer-1.0.2.tgz ...
Starting to download PHP_Timer-1.0.2.tgz (3,686 bytes)
...done: 3,686 bytes
downloading PHPUnit_MockObject-1.1.1.tgz ...
Starting to download PHPUnit_MockObject-1.1.1.tgz (19,897 bytes)
...done: 19,897 bytes
downloading YAML-1.0.6.tgz ...
Starting to download YAML-1.0.6.tgz (10,010 bytes)
...done: 10,010 bytes
downloading PHP_TokenStream-1.1.3.tgz ...
Starting to download PHP_TokenStream-1.1.3.tgz (9,860 bytes)
...done: 9,860 bytes
install ok: channel://pear.phpunit.de/File_Iterator-1.3.1
install ok: channel://pear.phpunit.de/Text_Template-1.1.1
install ok: channel://pear.phpunit.de/PHP_Timer-1.0.2
install ok: channel://pear.symfony-project.com/YAML-1.0.6
install ok: channel://pear.phpunit.de/PHP_TokenStream-1.1.3
install ok: channel://pear.phpunit.de/PHP_CodeCoverage-1.1.3
install ok: channel://pear.phpunit.de/PHPUnit_MockObject-1.1.1
install ok: channel://pear.phpunit.de/PHPUnit-3.6.12
此时应发现 php 目录下，有phpunit，phpunit.bat两个文件，PEAR目录下有PHPUnit目录。
使用 phpunit --version 有 PHPUnit 3.6.12 by Sebastian Bergmann. 输出，说明安装成功。