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HomeBackend DevelopmentPHP TutorialPHP调用VC编写的COM组件实例_php实例

 
一、用VC创建COM组件
1、vc新建项目 -> ATL项目,输入名称ComTest,ComTest将作为COM组件的名称。


2、到了ATL项目向导,不需要改动,完成向导。向导完成后,vc将会自动生成一系列的程序。


3、切换到类视图,在ComTest项右键,添加类,选择ATL简单对象,


4、来到ATL简单对象向导,输入你要新建的类名 MyClass,完成向导。(注意了,还要填写ProgID,有些vs会自动补全)


5、回到类视图中,在IMyClass右键,添加方法,将会进入添加方法的向导。


6、来到添加方法向导,我们想实现计算2个数相加的功能,如下,参数a和b都是[in] Long,c为COM返回参数,为[out, retval] Long*,是一个指针。完成向导。

7、在MyClass.cpp找到我们刚刚添加的方法,add(LONG a, LONG b, LONG* c),修改如下:
复制代码 代码如下:
STDMETHODIMP CMyClass::add(LONG a, LONG b, LONG* c) 

    *c = a + b; 
    return S_OK; 
}

8、编译后,在生成目录找到ComTest.dll,注册到系统
复制代码 代码如下:
regsvr32 ComTest.dll

二、PHP调用COM组件

复制代码 代码如下:

$com = new COM("ComTest.MyClass") or die("无法调用ComTest"); 
echo $com->add(1, 2); 

正常情况下,到这里就完成了。

但默认情况下,PHP调用COM组件的功能是没有打开的。PHP执行以上代码就会报 Fatal error: Class 'COM' not found 错误。修改PHP配置,如下:

复制代码 代码如下:

extension=php_com_dotnet.dll 

结束语
这个功能是PHP调用COM组件的功能,虽然很方便调用,开发也比较简单,但也因为使用COM组件技术,限定了只有Windows的机子才能使用。


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