Global Graphics Page Graphics Buffer

import magic
# Libmagic lacks definitions for the proprietary PGB format. It will likely identify the file as 'application/octet-stream'.
print(magic.from_file('separation.pgb', mime=True))

const mime = require('mime');
// Many JS MIME libraries map .pgb to image/vnd.globalgraphics.pgb purely based on historical IANA registry associations
console.log(mime.getType('separation.pgb')); // Outputs 'image/vnd.globalgraphics.pgb'

import "net/http"
// The standard net/http library cannot detect Harlequin PGB files internally via byte sniffing. You must rely on extension string matching.

$mime = mime_content_type('separation.pgb');
echo $mime; // Standard server environments will map this to application/octet-stream