PHP扩展开发与实践
- C扩展原生开发
- Zephir语言开发扩展
Hello World!示例
C 扩展原生开发
优点:性能,操作底层接口(内存),修改内核行为 缺点:对于不熟c语言,难上手,同时还需要阅读ZEND_API
参考文档:
实现过程:
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下载php-src源码
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编译工具
- gcc c语言编译器
- make c/c++自动构建工具
- autoconf 检查系统环境与编译参数
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进入php-src
目录结构 bulid ext(php自带扩展) ext_skel(创建扩展工程脚本) .... main netware .... -
执行./ext_skel --extname=test 创建一个test扩展工程
juzhag@juzhag-virtual-machine:/mnt/hgfs/ubuntu/php/php-5.5.27/ext$ ./ext_skel --extname=test Creating directory test Creating basic files: config.m4 config.w32 .svnignore test.c php_test.h CREDITS EXPERIMENTAL tests/001.phpt test.php [done]. To use your new extension, you will have to execute the following steps: 1. $ cd .. 2. $ vi ext/test/config.m4 3. $ ./buildconf 4. $ ./configure --[with|enable]-test 5. $ make 6. $ ./sapi/cli/php -f ext/test/test.php 7. $ vi ext/test/test.c 8. $ make Repeat steps 3-6 until you are satisfied with ext/test/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. juzhag@juzhag-virtual-machine:/mnt/hgfs/ubuntu/php/php-5.5.27/ext$ cd test/ juzhag@juzhag-virtual-machine:/mnt/hgfs/ubuntu/php/php-5.5.27/ext/test$ ll total 24 drwxrwxrwx 1 root root 4096 7月 19 13:39 ./ drwxrwxrwx 1 root root 8192 7月 19 13:39 ../ -rwxrwxrwx 1 root root 1986 7月 19 13:39 config.m4* -rwxrwxrwx 1 root root 282 7月 19 13:39 config.w32* -rwxrwxrwx 1 root root 4 7月 19 13:39 CREDITS* -rwxrwxrwx 1 root root 0 7月 19 13:39 EXPERIMENTAL* -rwxrwxrwx 1 root root 2812 7月 19 13:39 php_test.h* -rwxrwxrwx 1 root root 16 7月 19 13:39 .svnignore* -rwxrwxrwx 1 root root 5044 7月 19 13:39 test.c* -rwxrwxrwx 1 root root 496 7月 19 13:39 test.php* drwxrwxrwx 1 root root 0 7月 19 13:39 tests/ -
注意到config.m4,autoconf的配置文件,编写test扩展配置
dnl 注释去除PHP_ARG_WITH(test, for test support, [ --with-test Include test support]) -
执行phpize命令,根据php的版本信息,生成configure文件
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执行./configure shell脚本检查编译环境
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产生Makefile编译的配置文件
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make && make install
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在php.ini添加 test.so
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测试test目录下的test.php文件即可证明是否生效confirm_test_compiled函数
接下来进行hello world 示例编写
注意刚才test目录下有php_test.h头文件,test.c源文件
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php_test.h 声明一个函数
PHP_FUNCTION(test_hello); -
test.c 编写源码
PHP_FUNCTION(test_hello) { int len; char *strg; len = spprintf(&strg, 0, "Hello World"); RETURN_STRINGL(strg, len, 0); } -
test.c 编写源码,注册函数
const zend_function_entry test_functions[] = { PHP_FE(test_hello, NULL) } -
重新
make && make install -
编写php脚本,执行
echo test_hello();
上述RETURN_STRINGL,PHP_FE...具体代码使用api,请参考zend API,在php源码根目录下的zend目录zend_API.h文件
Zephir语言开发扩展
优点:类似php语言书写,易上手,快速生成c扩展
缺点:还是得看文档
安装需求(http://zephir-lang.com/install.html):
- gcc >= 4.x/clang >= 3.x
- re2c 0.13 or later
- gnu make 3.81 or later
- autoconf 2.31 or later
- automake 1.14 or later
- libpcre3
- php development headers and tools
安装成功:
编写hello world 案例
实现过程(http://zephir-lang.com/tutorial.html#checking-installation):
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zephir init utils 初始化工程,命名为utils
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cd utils
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vi utils/greeting.zep
namespace Utils; class Greeting { public static function say() { echo "hello world!"; } } -
zephir build
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vi php.ini
extension=utils.so -
php test.php
<?php echo Utils\Greeting::say(), "\n";
Hello World就是这么简单易用,具体开发细节请查看手册
@author 詹巨章 zhanjuzhang@gmail.com
@date 2015/7/19 16:27:25
