PHP Extension 扩展开发

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第 23 章 PHP Extension 扩展开发


　　目录

1. Extension Example
2. PHP_MINFO_FUNCTION


1. Extension Example



　　创建一个扩展只需要下面几个步骤


# cd php-5.4.14/ext/
# ./ext_skel --extname=netkiller
# cd netkiller
# /srv/php-5.4.8/bin/phpize
# ./configure --enable-netkiller --with-php-config=/srv/php-5.4.8/bin/php-config
# make
# make install

　　下面我们开始分部讲解，首先创建一个扩展。


./ext_skel --extname=netkiller
Creating directory netkiller
Creating basic files: config.m4 config.w32 .cvsignore netkiller.c php_netkiller.h CREDITS EXPERIMENTAL tests/001.phpt netkiller.php [done].
To use your new extension, you will have to execute the following steps:
1.  $ cd ..
2.  $ vi ext/netkiller/config.m4
3.  $ ./buildconf
4.  $ ./configure --[with|enable]-netkiller
5.  $ make
6.  $ ./php -f ext/netkiller/netkiller.php
7.  $ vi ext/netkiller/netkiller.c
8.  $ make
Repeat steps 3-6 until you are satisfied with ext/netkiller/config.m4 and
step 6 confirms that your module is compiled into PHP. Then, start writing
code and repeat the last two steps as often as necessary.

　　编辑config.m4


# vim netkiller/config.m4
PHP_ARG_ENABLE(netkiller, whether to enable netkiller support,
Make sure that the comment is aligned:
[  --enable-netkiller           Enable netkiller support])

　　去掉上面三行前的dnl， dnl 表示注释


# cat config.m4 | grep -v 'dnl'
PHP_ARG_ENABLE(netkiller, whether to enable netkiller support,
Make sure that the comment is aligned:
[  --enable-netkiller           Enable netkiller support])
if test "$PHP_netkiller" != "no"; then
PHP_NEW_EXTENSION(netkiller, netkiller.c, $ext_shared)
fi

　　执行 phpize


# cd netkiller
# /srv/php-5.4.8/bin/phpize
Configuring for:
PHP Api Version:         20100412
Zend Module Api No:      20100525
Zend Extension Api No:   220100525
# ./configure --enable-netkiller --with-php-config=/srv/php-5.4.8/bin/php-config
# make
# make install
# ls modules/
netkiller.la  netkiller.so

　　创建 ini 文件


cat >> /srv/php/etc/conf.d/netkiller.ini <<PHP
extension=netkiller.so
PHP

　　确认扩展看装成功


# /srv/php/bin/php -f netkiller.php
Functions available in the test extension:
confirm_netkiller_compiled
Congratulations! You have successfully modified ext/netkiller/config.m4. Module netkiller is now compiled into PHP.
# /srv/php-5.4.8/bin/php -m | grep netkiller
netkiller

　　创建 php 测试程序


vim test.php
<?php
echo confirm_netkiller_compiled('netkiller');
phpinfo();

　　输出结果


Congratulations! You have successfully modified ext/netkiller/config.m4. Module netkiller is now compiled into PHP.
netkiller
---------------------------
netkiller supportenabled