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# Setting PDF compliance to PDF/A-1b using COM interop (PHP)

Hello, I’m trying to use aspose.words for Net (17.2.0) to make PDF/A-1b compliant PDFs.

I have no issues converting a DOCX to PDF, but I’m stuck trying to figure out how to save the final PDF as PDF/A1-B compliant using the COM within PHP.

Hi,

Aspose.Words.dll can be accessed as a COM object. If you need to use many of the Aspose.Words classes, methods and properties, consider creating a wrapper assembly (using C# or any other .NET programming language), that will help to avoid using Aspose.Words directly from unmanaged code.

A good approach is to develop a .NET assembly that references Aspose.Words and does all the work with it, and only exposes the minimal set of classes and methods to unmanaged code. Your application then should work just with your wrapper library. For example, you can create a wrapper that uses latest Aspose.Words for .NET assembly as follows:

1. Open Visual Studio and create “Class Library” project and add a reference to latest Aspose.Words assembly.
2. Create method, which accepts two parameters (input document path and output document path). Here is source code of the wrapper:
namespace AsposeComWrapper
{
public class Methods
{
public Methods() { }
public void SaveAsPdfA1b(object inPath, object outPath)
{
Document doc = new Document((string)inPath);
PdfSaveOptions saveOptions = new PdfSaveOptions();
saveOptions.Compliance = PdfCompliance.PdfA1b;
doc.Save((string)outPath, saveOptions);
}
}
}

1. Now, you should make your class library signed and visible for COM.

2. After building the project, you should register the DLL using the following command:
regasm /codebase AsposeComWrapper.dll

3. Once your helper DLL is registered, you can use it to export Word document to PDF with PdfCompliance.PdfA1b option. Here is sample calling VB code (I am afraid, I am not familiar with PHP):

<%
Dim lic