After I upgrade the version of livesurvey CE offline from 3.14.8 to 3.22.15 + 200505.

I use the file upload type in the survey,when the user participates in the survey and uploads the file, the prompt "sorry, Unable to check extension of this file type '.

I'm sure that I have set the file type allowed to upload in the questionnaire settings. What should I do? There is a problem with offline upgrade?

For offline upgrade, I refer to the manual upgrade method and keep it config.php File, template directory and upload directory, and other upload overwrites.

It come from github.com/LimeSurvey/LimeSurvey/blob/cd...rController.php#L197

It mean : your server can check ?ico file type : you have file_info.

But when checking your filetype : it return an empty. Your server didn't know this file type.

What file type is it ?

Thank you. When I installed phpfifle component on the server, it was finally OK, but the previous version did not have this environment

phpfifle ?

Didn't know this extension ?

fileinfo，PHP'sextension