ubuntu12.10以后，默认的deb安装库上面的php版本已经是5.4了，公司的项目使用5.4的时候，还是会出现很多问题，所以不得不降级安装5.3
顺便说一句，我原来的环境是nginx + php5.4 + mysql 的，现在只是把php5.4降级到php5.3，其它的不修复。
新建一个叫做down_to_php53.sh，然后复制下面代码进去
#!/bin/bash
#
# Original for 5.3 by Ruben Barkow (rubo77) http://www.entikey.z11.de/
# release PHP5. to 5.3 by Emil Terziev ( foxy ) Bulgaria # Originally Posted by Bachstelze http://ubuntuforums.org/showthread.php?p=9080474#post9080474
# OK, here's how to do the Apt magic to get PHP packages from the precise repositories: echo "Am I root? "
if [ "$(whoami &2>/dev/null)" != "root" ] && [ "$(id -un &2>/dev/null)" != "root" ] ; then
echo " NO! Error: You must be root to run this script.
Enter
sudo su
"
exit
fi
echo " OK"; #install aptitude before, if you don`t have it:
apt-get update
apt-get install aptitude
# or if you prefer apt-get use:
# alias aptitude='apt-get' # finish all apt-problems:
aptitude update
aptitude -f install
#apt-get -f install # remove all your existing PHP packages. You can list them with dpkg -l| grep php
PHPLIST=$(for i in $(dpkg -l | grep php|awk '{ print $2 }' ); do echo $i; done)
echo these pachets will be removed: $PHPLIST
# you need not to purge, if you have upgraded from precise:
aptitude remove $PHPLIST
# on a fresh install, you need purge:
# aptitude remove --purge $PHPLIST #Create a file each in /etc/apt/preferences.d like this (call it for example /etc/apt/preferences.d/php5_2);
#
#Package: php5
#Pin: release a=precise
#Pin-Priority:
#
#The big problem is that wildcards don't work, so you will need one such stanza for each PHP package you want to pull from precise: echo ''>/etc/apt/preferences.d/php5_3
for i in $PHPLIST ; do echo "Package: $i
Pin: release a=precise
Pin-Priority:
">>/etc/apt/preferences.d/php5_3; done echo "# needed sources vor php5.3:
deb http://bg.archive.ubuntu.com/ubuntu/ precise main restricted
deb-src http://bg.archive.ubuntu.com/ubuntu/ precise main restricted deb http://bg.archive.ubuntu.com/ubuntu/ precise-updates main restricted
deb-src http://bg.archive.ubuntu.com/ubuntu/ precise-updates main restricted deb http://bg.archive.ubuntu.com/ubuntu/ precise universe
deb-src http://bg.archive.ubuntu.com/ubuntu/ precise universe
deb http://bg.archive.ubuntu.com/ubuntu/ precise-updates universe
deb-src http://bg.archive.ubuntu.com/ubuntu/ precise-updates universe deb http://bg.archive.ubuntu.com/ubuntu/ precise multiverse
deb-src http://bg.archive.ubuntu.com/ubuntu/ precise multiverse
deb http://bg.archive.ubuntu.com/ubuntu/ precise-updates multiverse
deb-src http://bg.archive.ubuntu.com/ubuntu/ precise-updates multiverse
deb-src http://bg.archive.ubuntu.com/ubuntu/ natty-backports main restricted universe multiverse deb http://security.ubuntu.com/ubuntu precise-security main restricted
deb-src http://security.ubuntu.com/ubuntu precise-security main restricted
deb http://security.ubuntu.com/ubuntu precise-security universe
deb-src http://security.ubuntu.com/ubuntu precise-security universe
deb http://security.ubuntu.com/ubuntu precise-security multiverse
deb-src http://security.ubuntu.com/ubuntu precise-security multiverse deb-src http://archive.canonical.com/ubuntu natty partner deb http://extras.ubuntu.com/ubuntu precise main
deb-src http://extras.ubuntu.com/ubuntu precise main deb http://bg.archive.ubuntu.com/ubuntu/ precise-backports main restricted universe multiverse
deb-src http://bg.archive.ubuntu.com/ubuntu/ precise-backports main restricted universe multiverse deb http://archive.canonical.com/ubuntu precise partner
deb-src http://archive.canonical.com/ubuntu precise partner " >> /etc/apt/sources.list.d/precise.list aptitude update #apache2ctl restart echo install new from precise:
aptitude -t precise install $PHPLIST # at the end retry the modul libapache2-mod-php5 in case it didn't work the first time:
#aptitude -t precise install libapache2-mod-php5 #apache2ctl restart
然后执行
chmod +x down_to_php53.sh
sudo ./down_to_php53.sh
执行完之后，重启php5-fpm和ngnix
sudo /etc/init.d/php5-fpm restart
sudo /etc/init.d/nginx restart
这时，访问 http://127.0.0.1/，会出现502错误，查看ngnix日志，有如下问题
// :: [crit] #: * connect() to unix:/var/run/php5-fpm.sock failed (: No such file or directory) while connecting to upstream, client: 127.0.0.1, server: localhost, request: "GET /phpinfo.php HTTP/1.1", upstream: "fastcgi://unix:/var/run/php5-fpm.sock:", host: "127.0.0.1"
// :: [error] #: * rewrite or internal redirection cycle while internally redirecting to "/index.html", client: 127.0.0.1, server: localhost, request: "GET /favicon.ico HTTP/1.1", host: "127.0.0.1"
这是因为原来在nginx，我是这样配置的
location ~ \.php$ {
fastcgi_split_path_info ^(.+\.php)(/.+)$;
# # NOTE: You should have "cgi.fix_pathinfo = 0;" in php.ini
#
# # With php5-cgi alone:
# fastcgi_pass 127.0.0.1:;
# # With php5-fpm:
fastcgi_pass unix:/var/run/php5-fpm.sock;
fastcgi_index index.php;
include fastcgi_params;
}使用socket来连接，所以降级之后，还要修改一下新的配置文件
vim /etc/php5/fpm/pool.d/www.conf
找到
listen = 127.0.0.1:
加入
listen = /var/run/php5-fpm.sock
就可以了
Have fun with Ubuntu!