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PHP扩展开发01:第一个扩展【转】,php01
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PHP扩展开发01:第一个扩展【转】,php01

Jun 13, 2016 am 08:44 AM
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PHP扩展开发01:第一个扩展【转】,php01

 

我们先假设业务场景,是需要有这么一个扩展,提供一个叫ccvita_string的函数,他的主要作用是返回一段字符。(这个业务场景实在太假,大家就这么看看吧)对应的PHP代码可能是这样:

<span>function</span> ccvita_string(<span>$str</span><span>){
     </span><span>$result</span> = '<a href="'.<span>$str</span>.'">Link</a>'<span>;
     </span><span>return</span> <span>$result</span><span>;
}</span>
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第一步,生成代码
PHP为了扩展开发的方便,提供了一个类似代码生成器的工具ext_skel,具体可以参见说明。
首先我们创建一个文件ccvita.skel,它的内容为

<span>string</span> ccvita_string(<span>string</span> str)
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就是告诉ext_skel这个东西,我们要做的扩展里面有个函数叫ccvita_string。然后执行

cd MooENV/src/php-<span>5.3</span>.<span>8</span>/ext/<span>
.</span>/ext_skel --extname=ccvita --proto=<span>ccvita.skel
cd ccvita</span>/
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这时候,ccvita这个扩展的代码框架就已经出来了。

第二步,修改配置
然后修改config.m4文件将10、11、12三行最前面的dnl删除掉,就是将

dnl PHP_ARG_WITH(ccvita, for ccvita support,<span>
dnl Make sure that the comment is aligned:
dnl </span><span>[</span><span>  --with-ccvita             Include ccvita support</span><span>]</span>)
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修改为

PHP_ARG_WITH(ccvita, for ccvita support,<span>
Make sure that the comment is aligned:
</span><span>[</span><span>  --with-ccvita             Include ccvita support</span><span>]</span>)
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第三步,实现功能
修改源码ccvita.c文件
找到将ccvita_string这个函数修改为

<span>PHP_FUNCTION(ccvita_string)
{
    </span><span>char</span> *str =<span> NULL;
    </span><span>int</span> argc =<span> ZEND_NUM_ARGS();
    </span><span>int</span><span> str_len;
    </span><span>char</span> *<span>result;
 
    </span><span>if</span> (zend_parse_parameters(argc TSRMLS_CC, <span>"</span><span>s</span><span>"</span>, &str, &str_len) ==<span> FAILURE) 
        </span><span>return</span><span>;
 
    str_len </span>= spprintf(&result, <span>0</span>, <span>"</span><span><a href=\"%.78s\">Link</a></span><span>"</span><span>, str);
    RETURN_STRINGL(result, str_len, </span><span>0</span><span>); 
}</span>
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第四步,编译扩展
保存后,开始编译

/usr/local/php/bin/<span>phpize
.</span>/configure --with-php-config=/usr/local/php/bin/php-<span>config
</span><span>make</span>
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第五步,添加扩展
这时候,一切顺利的话,该扩展已经在modules/ccvita.so这个位置了。下面就是将这个扩展加入到PHP中去,让我们PHP程序可以调用到。

<span>cp</span> modules/ccvita.so /usr/local/php/ext/<span>
vim </span>/usr/local/php/etc/<span>php.ini
extension</span>=/usr/local/php/ext/<span>ccvita.so #在php.ini文件最后增加这一行
service php</span>-<span>fpm restart #重启PHP服务
</span><span>cp</span> ccvita.php /data/www/wwwroot/default/
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相关代码,可以在我的github上clone出来,地址:https://github.com/KimiChen/PHP-EXT接下来就可以访问ccvita.php这个文件,测试扩展了。下一篇,将会涉及一些更深入的内容。

转自博客(http://www.ccvita.com/496.html)

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