首先写ActiveX Dll：
新建一个VB6工程，ActiveX Dll将工程命名为P_test,类名为c_test ，类的文件内容如下：
Option Explicit
Private MyScriptingContext As ScriptingContext
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 < 0 Then Get_Number_Attrib = -1
If num 0 Then Get_Number_Attrib = 1
If num = 0 Then Get_Number_Attrib = 0
End Function
编译生成p_test.dll文件
注册
提示符下运行：regsvr32 p_test.dll
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;
?＞
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 。