Online PHP editor | output for QuMf8

<?php $string = '=?UTF-8?B?0KHQutC70LDQtCDQntCe0J4g0JPQsNGA0LDQvdGCINC00LvRjyDQkdGL0YHRgtGA0L7QutCw0LHQtdC7?= =?UTF-8?B?0YwsIFJ1c0NhYmxlLCDQmtCw0LHQtdC70YzQvdGL0Lkg0YHQv9GA0LDQstC+0YfQvdC40LosINCT0LQ=?= =?UTF-8?B?0LXQmtCw0LHQtdC70YwsINCa0LDQsdC10LvRjCDQntC90LvQsNC50L0uINGCLiA4LTkwOS0zNDMtMTMt?= 00..xls'; function decode_utf8(string $str): string { $temp = preg_split('/\s*\?=\s*/', preg_replace('/\s*=\?UTF-8\?B\?\s*/', '', $str)); $end = array_pop($temp); $out = ''; foreach ($temp as $value) { $out .= base64_decode($value); } return $out . $end; } echo decode_utf8($string);