Howto: Enable PCNTL in Ubuntu PHP installations

怎样启用Ubuntu（deb包）安装PHP的PCNTL

PCNTL in PHP allows for some handy advanced “trickery” using the OS process functions inherent in Linux (*nix?).  I believe some features are available in Windows, but I know for certain that pcntl_fork() is not.

Anyway, it is not enabled by default, so if you want to take advantage of the functions on your Ubuntu LAMP server, you might spend hours searching the web for that magic aptitude command.  But, as far as I can tell, it doesn’t exist.


Luckily, I stumbled across this article on the Ubuntu forums, so I’m dedicating a post here with the hopes that other will find it more easily.


Please note that you’ll probably need build-essentials and a few other source compilation basics, but as long as you have that, the following code will get you what you want.


First, in your home directory:
上面大致介绍了PNCTL的好处，但是默认在linux下是没有启用这个功能的，在这里作者使用的是Ubuntu下的LAMP安装，通过一下过程就可以开启需要的功能

mkdir php
cd php
apt-get source php5
cd php5-(WHATEVER_RELEASE)/ext/pcntl
phpize
./configure
make
Then:

cp modules/pcntl.so /usr/lib/php5/WHEVER_YOUR_SO_FILES_ARE/

拷贝so文件到php5的扩展目录

echo "extension=pcntl.so" > /etc/php5/conf.d/pcntl.ini

修改配置文件，在deb安装的环境下扩展配置是都是独立的文件

FYI: “make install” does not appear to put the files in the correct place.
可能使用make install并不能拷贝文件到php扩展目录，经过测试是可以的，如果是普通用户，需要使用sudo来执行。