我阅读了其他 PHPUnit 安装问题，但没有取得任何成功。我的 PEAR 安装发生了什么？
$ sudo pear update-channels
Updating channel "components.ez.no"
Channel "components.ez.no" is up to date
Updating channel "doc.php.net"
Channel "doc.php.net" is up to date
Updating channel "pear.php.net"
Channel "pear.php.net" is up to date
Updating channel "pear.phpunit.de"
Channel "pear.phpunit.de" is up to date
Updating channel "pear.symfony-project.com"
Channel "pear.symfony-project.com" is up to date
Updating channel "pecl.php.net"
Channel "pecl.php.net" is up to date
$ sudo pear upgrade pear
Nothing to upgrade
$ sudo pear install phpunit/PHPUnit
phpunit/PHPUnit requires PEAR Installer (version >= 1.9.2), installed version is 1.9.0
phpunit/PHPUnit can optionally use PHP extension "dbus"
phpunit/DbUnit requires PEAR Installer (version >= 1.9.2), installed version is 1.9.0
phpunit/File_Iterator requires PEAR Installer (version >= 1.9.2), installed version is 1.9.0
phpunit/PHP_CodeCoverage requires PEAR Installer (version >= 1.9.1), installed version is 1.9.0
phpunit/PHP_CodeCoverage requires package "phpunit/File_Iterator" (version >= 1.2.2)
phpunit/PHP_CodeCoverage can optionally use PHP extension "xdebug" (version >= 2.0.5)
phpunit/PHPUnit_MockObject requires PEAR Installer (version >= 1.9.2), installed version is 1.9.0
phpunit/PHPUnit_Selenium requires PEAR Installer (version >= 1.9.2), installed version is 1.9.0
phpunit/PHP_TokenStream requires PEAR Installer (version >= 1.9.1), installed version is 1.9.0
No valid packages found
install failed
$ pear list
Installed packages, channel pear.php.net:
=========================================
Package Version State
Archive_Tar 1.3.7 stable
Cache_Lite 1.7.11 stable
Console_Getopt 1.3.1 stable
HTTP_Request2 2.0.0RC1 beta
Net_URL2 0.3.1 beta
PEAR 1.9.3 stable
Structures_Graph 1.0.4 stable
XML_RPC2 1.1.1 stable
XML_Util 1.2.1 stable
greg@ubuntu:~$ pear -V
PEAR Version: 1.9.0
PHP Version: 5.3.6
Zend Engine Version: 2.3.0
Running on: Linux ubuntu 2.6.32-32-generic-pae #62-Ubuntu SMP Wed Apr 20 22:10:33 UTC 2011 i686
pear list报告已安装 1.9.3，pear -V报告1.9.0！？！
Update尝试了 KingCrunch 的建议。
$ sudo pear install -f pear
[sudo] password for greg:
downloading PEAR-1.9.3.tgz ...
Starting to download PEAR-1.9.3.tgz (295,774 bytes)
...........................done: 295,774 bytes
install ok: channel://pear.php.net/PEAR-1.9.3
PEAR: Optional feature webinstaller available (PEAR's web-based installer)
PEAR: Optional feature gtkinstaller available (PEAR's PHP-GTK-based installer)
PEAR: Optional feature gtk2installer available (PEAR's PHP-GTK2-based installer)
PEAR: To install optional features use "pear install pear/PEAR#featurename"
$ pear -V
PEAR Version: 1.9.0
PHP Version: 5.3.6
Zend Engine Version: 2.3.0
Running on: Linux ubuntu 2.6.32-32-generic-pae #62-Ubuntu SMP Wed Apr 20 22:10:33 UTC 2011 i686
您的计算机上基本上安装了 2 个 pear，“pear 升级”命令会更新另一个，而不是它本身。
我假设您正在运行的 pear 版本已通过 ubuntu 的 apt 安装。
找出它的安装位置apt（在 Debian/Ubuntu 上）：
$ dpkg -L php-pear
...
/usr/share/php/PEAR.php
...
/usr/bin/pear
现在让我们看看 pear 将文件安装到哪里：
$ pear config-get php_dir
/usr/share/php
在我的机器上，它是相同的 - 但可能不是在你的机器上，这就是问题所在。通过设置修复它php_dir，以及bin_dir:
$ pear config-set php_dir /usr/share/php
$ pear config-set bin_dir /usr/bin
或者，删除 ubuntu pear 并从以下位置重新安装http://pear.php.net/go-pear.phar http://pear.php.net/go-pear.phar
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