Checking Mime-type for uploaded file in PHP - problem that making me confused so much

[Shaharia Azam]

Hello,

Today I am facing a very strange problem while I was just checking mime-type for uploaded files by my app users in PHP.

But it seems, none of the popular PHP functions are working.

Here it is I tried already.

// Solution # 1

$finfo = finfo_open(FILEINFO_MIME_TYPE);

        $mtype = finfo_file($finfo, $tmpFile);

        finfo_close($finfo);

        if ($mtype == ("application/msword") ||

            $mtype == ("application/vnd.openxmlformats-officedocument.wordprocessingml.document") ||

            $mtype == ("application/pdf")

        ) {

            return true;

        } else {

            return false;

        }

//Solution # 2

$mimeArray = array(

            'application/msword',

            'application/vnd.openxmlformats-officedocument.wordprocessingml.document',

            'application/pdf'

        );

        $mime = mime_content_type($tmpFile);

        if (!in_array($mime, $mimeArray)) {

            return false;

        } else {

            return true;

        }

finfo_file, finfo_open, mime_content_type none of these functions are working. So for PHP application running on GAE standard environment, what's the most safest and easiest ways to detect file's mime-type in PHP?

Thanks in advance.


Regards,

Shaharia Azam

[Yannick (Cloud Platform Support)]

The file info extension is available to be dynamically loaded onto App Engine. You should be able to use it once you add the following to your php.ini:

extension = "fileinfo.so"

[Shaharia Azam]

Wow. awesome. It works. 

I guess, I should make a list of available dynamically loaded module list for GAE PHP Standard environment.

Btw, thanks.