Recently, the project requires PHP to parse binary data. If it is more difficult to directly use PHP, You need to compile the COM component in VC to provide PHP calls. This article introduces how to compile the COM component in VC to provide PHP call to calculate the addition of two numbers.
1. Use VC to create COM components1. Create a project in vc-> ATL Project. Enter the name ComTest and ComTest as the name of the COM component.
2. Complete the wizard without any changes to the ATL Project Wizard. After the Wizard is complete, vc will automatically generate a series of programs.
3. Switch to the Class View, right-click the ComTest item, add a class, and select an ATL simple object,
4. Go to the ATL simple object wizard and enter the new class name MyClass to complete the wizard. (Note: You must enter the ProgID, and some vs will automatically complete the configuration)
5. Return to the Class View and right-click IMyClass to add a method. The Wizard for adding a method will be displayed.
6. in the add method wizard, we want to calculate the sum of two numbers. For example, parameters a and B are both [in] Long, and c are the return parameters of COM, which are [out, retval] Long * is a pointer. Complete the wizard.
7. Find the method we just added in MyClass. cpp, add (LONG a, LONG B, LONG * c), and modify it as follows:
The Code is as follows:
STDMETHODIMP CMyClass: add (LONG a, LONG B, LONG * c)
{
* C = a + B;
Return S_ OK;
}
8. After compilation, find ComTest. dll in the generated directory and register it with the system.
The Code is as follows:
Regsvr32 ComTest. dll
Ii. PHP calls COM components
The Code is as follows:
$ Com = new COM ("ComTest. MyClass") or die ("cannot call ComTest ");
Echo $ com-> add (1, 2 );
Under normal circumstances, it will be done here.
However, by default, PHP does not enable the function of calling the COM component. When PHP executes the above code, it will report the Fatal error: Class 'com' not found error. Modify the PHP configuration as follows:
The Code is as follows:
Extension = php_com_dotnet.dll
Conclusion
This function is used by PHP to call COM components. Although it is convenient to call and development is relatively simple, it is only available for Windows machines because of the use of COM component technology.
