搞完了php4调用javabean，又想去试试调用com，开始以为很难，自己用vb6写了一个active dll在php4中调用，马上成功，比调用javabean方便多了，下面讲一下我的步骤。
一：用VB6写Activex Dll
代码如下：
Option Explicit
Private MyScriptingContext As ScriptingContext
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Private MyApplication As Application
Private MyRequest As Request Private MyResponse As Response
Private MyServer As Server
Private MySession As Session Public
Sub OnStartPage(PassedScriptingContext As ScriptingContext)
Set MyScriptingContext = PassedScriptingContext
Set MyApplication = MyScriptingContext.Application
Set MyRequest = MyScriptingContext.Request
Set MyResponse = MyScriptingContext.Response
Set MyServer = MyScriptingContext.Server
Set MySession = MyScriptingContext.Session
End Sub
Public Sub OnEndPage()
Set MyScriptingContext = Nothing
Set MyApplication = Nothing
Set MyRequest = Nothing
Set MyResponse = Nothing
Set MyServer = Nothing
Set MySession = Nothing
End Sub
Public Function Test_Number(num) As Variant
If num
If num > 0 Then Get_Number_Attrib = 1
If num = 0 Then Get_Number_Attrib = 0
End Function
具体方法如下：新建一个VB6工程，ActiveX Dll将工程命名为P_test,类名为c_test
类的文件内容如上。
编译生成p_test.dll文件
二：注册
提示符下运行：regsvr32 p_test.dll
三：编写php文件，test.php4代码如下：
$b=new COM(\"p_test.c_test\");
$a=$b->Test_Number(-454);
echo $a;
?>
运行php4文件将显示-1
可能遇到的问题是，编译工程时通不过，要将
Microsoft Active Server Pages Object Library
引用进来，具体实现“Project->References”找到改库，并勾上
相比之下，PHP4调用com应该比PHP4调用javabean好哦，因为毕竟是Ms系统嘛。大家也可以去自己编写调用数据库的控件，用PHP4调用，从某种程度上，和PHP调用javabean一样，可以说，实现了“隐藏源代码”。
欢迎有兴趣的朋友交流。
