How to implement document online preview function in PHP

Question

#Hello everyone, I want to implement the function of online document preview. Using the code shown in Figure 1, the preview function can be successfully implemented locally. However, when the code is uploaded to the server, the error shown in Figure 2 will be reported. I still don’t know how to solve it. I would like to ask if anyone has done a similar preview function before, and how to implement this idea? Thank you~

(local is windows, server is Linux)

Answer 1

The object was not instantiated successfully. Are you using Windows or Linux? Check whether the object reference was successful.

Answer 2

Looks like an encoding problem