JPEG XR Image (HEIF Container)

import magic
print(magic.from_file('photo.jxra', mime=True)) # Will likely default to generic 'image/heif' or 'application/octet-stream' without manual configuration

const FileType = require('file-type');
const type = await FileType.fromFile('photo.jxra');
console.log(type?.mime); // Standard parsers may fail to recognize the specific 'jxrA' brand

import "net/http"
// The standard net/http library cannot detect specific HEIF sub-brands.
// Custom ISOBMFF box parsing is required to read the 'jxrA' string.

$mime = mime_content_type('photo.jxra');
echo $mime; // Standard server environments will often resolve this to application/octet-stream