C语言PHP的helloworld扩展
1、下载php源码
wget http://cn2.php.net/distributions/php-5.6.10.tar.gztar -zxvf php-5.6.10.tar.gz
2、建立扩展开发框架 ./ext_skel --extname=helloworld
cd php-5.6.10/ext/./ext_skel --extname=helloworldCreating directory helloworldCreating basic files: config.m4 config.w32 .gitignore helloworld.c php_helloworld.h CREDITS EXPERIMENTAL tests/001.phpt helloworld.php [done].To use your new extension, you will have to execute the following steps:1. $ cd ..2. $ vi ext/helloworld/config.m43. $ ./buildconf4. $ ./configure --[with|enable]-helloworld5. $ make6. $ ./sapi/cli/php -f ext/helloworld/helloworld.php7. $ vi ext/helloworld/helloworld.c8. $ makeRepeat steps 3-6 until you are satisfied with ext/helloworld/config.m4 andstep 6 confirms that your module is compiled into PHP. Then, start writingcode and repeat the last two steps as often as necessary.
3、进入php源码的根目录， 编辑文件 vim ext/helloworld/config.m4
去掉这几行代码前面的dnl
PHP_ARG_ENABLE(helloworld, whether to enable helloworld support,Make sure that the comment is aligned:[ --enable-helloworld Enable helloworld support])
4、在php源码根目录执行命令 ./buildconf --force
Forcing buildconfRemoving configure cachesbuildconf: checking installation...buildconf: autoconf version 2.69 (ok)rebuilding configurerebuilding main/php_config.h.in
5、在php源码的根目录编译php程序，注意命令为 ./configure --with-helloworld
configure: WARNING: unrecognized options: --with-helloworldchecking for grep that handles long lines and -e... /bin/grepchecking for egrep... /bin/grep -Echecking for a sed that does not truncate output... /bin/sedchecking build system type... x86_64-unknown-linux-gnuchecking host system type... x86_64-unknown-linux-gnuchecking target system type... x86_64-unknown-linux-gnuchecking for cc... ccchecking whether the C compiler works... yeschecking for C compiler default output file name... a.outchecking for suffix of executables... checking whether we are cross compiling... nochecking for suffix of object files... ochecking whether we are using the GNU C compiler... yeschecking whether cc accepts -g... yeschecking for cc option to accept ISO C89... none neededchecking how to run the C preprocessor... cc -Echecking for icc... nochecking for suncc... no......最后出现的error，没有处理configure: error: xml2-config not found. Please check your libxml2 installation.
6、. 进入我们的扩展目录helloworld，执行命令 phpize（通过 sudo apt-get install php5-dev 安装 phpize），此时你的扩展目录会生成很多文件，可以用于后期编译。
cd php-5.6.10/ext/helloworldphpizeConfiguring for:PHP Api Version: 20121113Zend Module Api No: 20121212Zend Extension Api No: 220121212
7、在helloworld目录编译我们的扩展 ./configure --with-php-config=/usr/bin/php-config（使用你自己环境的php-config） --enable-helloworld
你可以通过一条命令查找你的php-config文件的位置（find / -name php-config）如下：我的地址为/usr/bin/php-config
./configure --with-php-config=/usr/bin/php-configchecking for grep that handles long lines and -e... /bin/grepchecking for egrep... /bin/grep -Echecking for a sed that does not truncate output... /bin/sedchecking for cc... ccchecking whether the C compiler works... yeschecking for C compiler default output file name... a.outchecking for suffix of executables... checking whether we are cross compiling... nochecking for suffix of object files... ochecking whether we are using the GNU C compiler... yeschecking whether cc accepts -g... yeschecking for cc option to accept ISO C89... none neededchecking how to run the C preprocessor... cc -Echecking for icc... nochecking for suncc... nochecking whether cc understands -c and -o together... yeschecking for system library directory... libchecking if compiler supports -R... no......
8、进入扩展helloworld目录，编辑文件php_helloworld.h，在最后一行添加函数PHP_FUNCTION(helloworldTest);
PHP_FUNCTION(helloworldTest);
9、用vim 打开helloword.c,在helloworld.c中实现我们的函数,之后 将helloworldTest函数加入到helloworld_functions[]中，保存退出
PHP_FUNCTION(helloworldTest){ RETURN_STRING("Hello World !", 1);}const zend_function_entry helloworld_functions[] = { PHP_FE(confirm_helloworld_compiled, NULL) /* For testing, remove later. */ PHP_FE(helloworldTest, NULL) PHP_FE_END /* Must be the last line in helloworld_functions[] */};10、执行make命令 make 编译扩展，我在运行的过程中还是比较顺利的。如果出现错误，请认真看前面步骤是否有错，我在第一遍做的时候也有错一般都是前面步骤有问题。
/bin/bash /php/php-5.6.10/ext/helloworld/libtool --mode=compile cc -I. -I/php/php-5.6.10/ext/helloworld -DPHP_ATOM_INC -I/php/php-5.6.10/ext/helloworld/include -I/php/php-5.6.10/ext/helloworld/main -I/php/php-5.6.10/ext/helloworld -I/usr/include/php5 -I/usr/include/php5/main -I/usr/include/php5/TSRM -I/usr/include/php5/Zend -I/usr/include/php5/ext -I/usr/include/php5/ext/date/lib -DHAVE_CONFIG_H -g -O2 -c /php/php-5.6.10/ext/helloworld/helloworld.c -o helloworld.lo libtool: compile: cc -I. -I/php/php-5.6.10/ext/helloworld -DPHP_ATOM_INC -I/php/php-5.6.10/ext/helloworld/include -I/php/php-5.6.10/ext/helloworld/main -I/php/php-5.6.10/ext/helloworld -I/usr/include/php5 -I/usr/include/php5/main -I/usr/include/php5/TSRM -I/usr/include/php5/Zend -I/usr/include/php5/ext -I/usr/include/php5/ext/date/lib -DHAVE_CONFIG_H -g -O2 -c /php/php-5.6.10/ext/helloworld/helloworld.c -fPIC -DPIC -o .libs/helloworld.o/bin/bash /php/php-5.6.10/ext/helloworld/libtool --mode=link cc -DPHP_ATOM_INC -I/php/php-5.6.10/ext/helloworld/include -I/php/php-5.6.10/ext/helloworld/main -I/php/php-5.6.10/ext/helloworld -I/usr/include/php5 -I/usr/include/php5/main -I/usr/include/php5/TSRM -I/usr/include/php5/Zend -I/usr/include/php5/ext -I/usr/include/php5/ext/date/lib -DHAVE_CONFIG_H -g -O2 -o helloworld.la -export-dynamic -avoid-version -prefer-pic -module -rpath /php/php-5.6.10/ext/helloworld/modules helloworld.lo libtool: link: cc -shared -fPIC -DPIC .libs/helloworld.o -O2 -Wl,-soname -Wl,helloworld.so -o .libs/helloworld.solibtool: link: ( cd ".libs" && rm -f "helloworld.la" && ln -s "../helloworld.la" "helloworld.la" )/bin/bash /php/php-5.6.10/ext/helloworld/libtool --mode=install cp ./helloworld.la /php/php-5.6.10/ext/helloworld/moduleslibtool: install: cp ./.libs/helloworld.so /php/php-5.6.10/ext/helloworld/modules/helloworld.solibtool: install: cp ./.libs/helloworld.lai /php/php-5.6.10/ext/helloworld/modules/helloworld.lalibtool: finish: PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/local/go/bin:/sbin" ldconfig -n /php/php-5.6.10/ext/helloworld/modules----------------------------------------------------------------------Libraries have been installed in: /php/php-5.6.10/ext/helloworld/modulesIf you ever happen to want to link against installed librariesin a given directory, LIBDIR, you must either use libtool, andspecify the full pathname of the library, or use the `-LLIBDIR'flag during linking and do at least one of the following: - add LIBDIR to the `LD_LIBRARY_PATH' environment variable during execution - add LIBDIR to the `LD_RUN_PATH' environment variable during linking - use the `-Wl,-rpath -Wl,LIBDIR' linker flag - have your system administrator add LIBDIR to `/etc/ld.so.conf'See any operating system documentation about shared libraries formore information, such as the ld(1) and ld.so(8) manual pages.----------------------------------------------------------------------Build complete.Don't forget to run 'make test'.
11、安装php
apt-get install php5 php5-gd php5-cli
11、将编译生成的helloworld.so 文件复制到你本机的php扩展目录
创建：info.php内容：phpinfo();php info.php | grep extenextension_dir => /usr/lib/php5/20121212 => /usr/lib/php5/20121212mbstring extension makes use of "streamable kanji code filter and converter", which is distributed under the GNU Lesser General Public License version 2.1.root@4ccdc77255ea:/php/php-5.6.10/ext/helloworld# cp modules/helloworld.so /usr/lib/php5/20121212/
12、配置php.ini 开启 helloworld.so 扩展
php info.php | grep php.iniLoaded Configuration File => /etc/php5/cli/php.iniroot@4ccdc77255ea:/php# vim /etc/php5/cli/conf.d/ php.ini
13、创建echo.php
<?php print_r(helloworldTest()); 结果：Hello World !
14、Docker中遇到的问题
1. apt-get install autoconf2. gcc make等依赖包安装
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