Excuse me, but when I follow
https://doc.php.net/php/dochowto/article.thequicky.exceptions.environment.php
to install pear, It generate this error msg like follows:
----------------------
[chunsong@forcekind-dx phpdoc]$ pear install doc.php.net/phd
No releases available for package "doc.php.net/phd"
install failed
---------------------


I've tryed to install phd by svn , too, But it can't succeed either
it gave out these messages:
--------------------------------
[chunsong@forcekind-dx phd]$ sudo pear install package.xml
package_generic.xml package_php.xml package_pear.xml 
Package "doc.php.net/PhD" dependency "doc.php.net/PhD_IDE" has no
releases
Did not download optional dependencies: phpdocs/PhD_IDE, use --alldeps
to download automatically
phpdocs/PhD requires PHP extension "zlib"
phpdocs/PhD can optionally use package "phpdocs/PhD_IDE"
phpdocs/PhD can optionally use PHP extension "haru"
phpdocs/PhD_Generic requires package "phpdocs/PhD" (version >= 0.9.0)
phpdocs/PhD_Generic can optionally use PHP extension "haru"
phpdocs/PhD_Generic can optionally use PHP extension "zlib"
phpdocs/PhD_PHP requires package "phpdocs/PhD" (version >= 0.9.0)
phpdocs/PhD_PHP can optionally use PHP extension "haru"
phpdocs/PhD_PHP can optionally use PHP extension "bz2"
phpdocs/PhD_PEAR requires package "phpdocs/PhD" (version >= 0.9.0)
No valid packages found
install failed
-----------------------------------



I can't figure out what the reason is. 
Could you please give me some directions ?
Thanks very much!

                                                       yours
                                                       Chunsong Tang  

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