Hi,

I'm having issues when attempting to serve a .docx file using Php. When uploading the file I detect the file mime type and upload the file using the file with the correct extension based on the mime type; e.g. below:

application/msword - doc
application/vnd.openxmlformats-officedocument.wordprocessingml.document - docx

When attempting to serve the files for download, I do the reverse in detecting the extension and serving based on the mime type e.g.

public static function fileMimeType($extention) {

        if(!is_null($extention)) {
            switch($extention) {
                case 'txt':
                    return 'text/plain';
                    break;
                case 'odt':
                    return 'application/vnd.oasis.opendocument.text';
                    break;
                case 'doc':
                    return 'application/msword';
                    break;
                case 'docx':
                    return 'application/vnd.openxmlformats-officedocument.wordprocessingml.document';
                    break;
                case ('jpg' || 'jpeg'):
                    return 'image/jpeg';
                    break;
                case 'png':
                    return 'image/png';
                    break;
                case 'pdf':
                    return 'application/pdf';
                    break;
                default:
                    break;
            }
        }

}

All files appear to download correctly and open fine but when attempting to open a docx file, Word (on multiple files) throws a error stating the file is corrupt.

Any ideas would be great, thanks.