PHP扩展生成器

  作者:zhanhailiang 日期:2013-02-05

第一种方法：使用PHP源码包自带的ext_skel工具。

~/public_html/php-5.3.13/ext> ./ext_skel  --extname=sample11
Creating directory sample11
Creating basic files: config.m4 config.w32 .svnignore sample11.c php_sample11.h CREDITS EXPERIMENTAL tests/001.phpt sample11.php [done].

To use your new extension, you will have to execute the following steps:

1.  $ cd ..
2.  $ vi ext/sample11/config.m4
3.  $ ./buildconf
4.  $ ./configure --[with|enable]-sample11
5.  $ make
6.  $ ./php -f ext/sample11/sample11.php
7.  $ vi ext/sample11/sample11.c
8.  $ make

Repeat steps 3-6 until you are satisfied with ext/sample11/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.

第二种方法：使用CodeGen_PECL。

/usr/local/services/php/bin> sudo ./pear install CodeGen_PECL
downloading CodeGen_PECL-1.1.3.tgz ...
Starting to download CodeGen_PECL-1.1.3.tgz (102,640 bytes)
........................done: 102,640 bytes
install ok: channel://pear.php.net/CodeGen_PECL-1.1.3

/usr/local/services/php/bin> sudo ln -s /usr/local/services/php/bin/pecl-gen /usr/local/bin/

~/public_html/php-5.3.13/ext> pecl-gen --extname=sample12

Strict Standards: Declaration of CodeGen_PECL_Element_Constant::docFooter() should be compatible with that of CodeGen_Element::docFooter() in /usr/local/services/php/lib/php/CodeGen/PECL/Element/Constant.php on line 341

Strict Standards: Declaration of CodeGen_PECL_Element_Resource::hCode() should be compatible with that of CodeGen_Element::hCode() in /usr/local/services/php/lib/php/CodeGen/PECL/Element/Resource.php on line 354

Strict Standards: Declaration of CodeGen_PECL_Element_Ini::docFooter() should be compatible with that of CodeGen_Element::docFooter() in /usr/local/services/php/lib/php/CodeGen/PECL/Element/Ini.php on line 443

Strict Standards: Declaration of CodeGen_PECL_Element_Logo::hCode() should be compatible with that of CodeGen_Element::hCode() in /usr/local/services/php/lib/php/CodeGen/PECL/Element/Logo.php on line 259

Strict Standards: Declaration of CodeGen_PECL_Element_Method::setCode() should be compatible with that of CodeGen_PECL_Element_Function::setCode() in /usr/local/services/php/lib/php/CodeGen/PECL/Element/Method.php on line 471

Strict Standards: Declaration of CodeGen_PECL_Element_Stream::hCode() should be compatible with that of CodeGen_Element::hCode() in /usr/local/services/php/lib/php/CodeGen/PECL/Element/Stream.php on line 239

Your extension has been created in directory ./sample12.
See ./sample12/README and/or ./sample12/INSTALL for further instructions.

注：报错“Strict Standards: Declaration of […] should be compatible with that of […] in […]”是因为PHP5.3.0+不允许子类方法签名与父类方法签名不匹配导致的，以上例第一个严格错误提示：

Strict Standards: Declaration of CodeGen_PECL_Element_Constant::docFooter() should be compatible with that of CodeGen_Element::docFooter() in /usr/local/services/php/lib/php/CodeGen/PECL/Element/Constant.php on line 341

如下对比CodeGen_PECL_Element_Constant和CodeGen_Element的docFooter方法的声明的差异：

/usr/local/services/php/lib/php/CodeGen> grep -Rn "class CodeGen_PECL_Element_Constant" . 
./PECL/Element/Constant.php:39:class CodeGen_PECL_Element_Constant 
/usr/local/services/php/lib/php/CodeGen> grep -Rn "class CodeGen_Element" .
./Element.php:33:abstract class CodeGen_Element 

// ./PECL/Element/Constant.php
330     /**-
331      * Generate DocBook XML section block footer
332      *
333      * @access public
334      * @param  string  Extension name
335      * @return string  DocBook XML snippet
336      */
337     static function docFooter()
338     {
339         return "  </variablelist>\n";
340     }
341 }
342 
343 ?>

// ./Element.php
292     /**                                                           
293      * Generate documentation footer block for all elements of this class  
294      *
295      * @access public                                             
296      * @param  string Extension name                              
297      * @return string documentation fragment                      
298      */
299     static function docFooter($name)
300     {
301         return "";
302     }                                                             
303         
304 }   
305                                                                   
306 ?>

请直接修改php.ini:

error_reporting = E_ALL & ~E_STRICT

以上只是给出了生成PHP扩展的最简单的命令，ext_skel和pecl-gen还支持多种参数生成更加丰富的扩展，请参考相关帮助文档。

~/public_html/php-5.3.13/ext> ./ext_skel --help
~/public_html/php-5.3.13/ext> pecl-gen --help

其中，pecl-gen支持从XML中导入生成扩展的强大功能，参见文档：CodeGen_PECL - the PHP extension generator