当php已经编译好在运行，又不想停机重新编译时可用此方法增加扩展。
增加自已写的库也可用此方法，参考HonestQiao 的记录
http://chinaunix.net/jh/27/547568.html
php之前的编译环境，
增加运行phpmsnclass需mhas和pcntl库为例
1.先下载类库
cd /home/c1g/src/
wget http://blog.s135.com/soft/linux/nginx_php/mcrypt/libmcrypt-2.5.8.tar.gz
wget http://blog.s135.com/soft/linux/nginx_php/mhash/mhash-0.9.9.9.tar.gz
wget http://blog.s135.com/soft/linux/nginx_php/mcrypt/mcrypt-2.6.8.tar.gz
2.编译安装类库
tar zxvf libmcrypt-2.5.8.tar.gz
cd libmcrypt-2.5.8/
./configure
make
make install
/sbin/ldconfig
cd libltdl/
./configure –enable-ltdl-install
make
make install
cd ../../
tar zxvf mhash-0.9.9.9.tar.gz
cd mhash-0.9.9.9/
./configure
make
make install
cd ../
ln -s /usr/local/lib/libmcrypt.la /usr/lib/libmcrypt.la
ln -s /usr/local/lib/libmcrypt.so /usr/lib/libmcrypt.so
ln -s /usr/local/lib/libmcrypt.so.4 /usr/lib/libmcrypt.so.4
ln -s /usr/local/lib/libmcrypt.so.4.4.8 /usr/lib/libmcrypt.so.4.4.8
ln -s /usr/local/lib/libmhash.a /usr/lib/libmhash.a
ln -s /usr/local/lib/libmhash.la /usr/lib/libmhash.la
ln -s /usr/local/lib/libmhash.so /usr/lib/libmhash.so
ln -s /usr/local/lib/libmhash.so.2 /usr/lib/libmhash.so.2
ln -s /usr/local/lib/libmhash.so.2.0.1 /usr/lib/libmhash.so.2.0.1
tar zxvf mcrypt-2.6.8.tar.gz
cd mcrypt-2.6.8/
/sbin/ldconfig
./configure
make
make install
cd ../
3.开始编译安装mhash扩展
进入php原始编译目录
cd /home/c1g/src/php-5.2.6/ext/mhash
/opt/php/bin/phpize
#会有以下信息生成，并产生编译文件
#Configuring for:
#PHP Api Version: 20041225
#Zend Module Api No: 20060613
#Zend Extension Api No: 220060519
./configure –with-php-config=/opt/php/bin/php-config
make
make install
生成的mhash.so会存下以下目录
Installing shared extensions: /opt/php/lib/php/extensions/no-debug-non-zts-20060613/
4.安装pcntl
cd ../pcntl
/opt/php/bin/phpize
./configure –with-php-config=/opt/php/bin/php-config
make
make install
生成的pcntl.so会存下以下目录
Installing shared extensions: /opt/php/lib/php/extensions/no-debug-non-zts-20060613/
5.编辑php.ini，指定好扩展的目录和需加载的库
extension_dir = “/opt/php/lib/php/extensions/no-debug-non-zts-20060613/”
extension=”mhash.so”
extension=”pcntl.so”
6.重新reload一下php
7.检查下是否已生效
/opt/php/bin/php -m
[PHP Modules]
bcmath
ctype
curl
date
dom
filter
gd
hash
iconv
json
libxml
mbstring
mcrypt
memcache
mhash
mysql
mysqli
pcntl
pcre
PDO
pdo_sqlite
posix
Reflection
session
shmop
SimpleXML
SPL
SQLite
standard
sysvsem
tokenizer
XCache
xml
xmlreader
xmlwriter
zlib
[Zend Modules]
XCache
参考:
http://blog.s135.com/nginx_php_v5/
http://blog.csdn.net/sdomain/archive/2009/09/04/4520425.aspx
您真厲害!!!!!
實在太感恩您的指導