- var_dump: documentation ( source)
- base64_decode: documentation ( source)
- mime_content_type: documentation ( source)
- base64_encode: documentation ( source)
<?php
$string = base64_decode('R0lGODlhAQABAIAAAAUEBAAAACwAAAAAAQABAAACAkQBADs=');
var_dump(@mime_content_type('data://text/plain;base64,' . base64_encode($string)));