<?php
$response = "0;78d13qqoglyszmorspfwfdmwffgnubgr;\u003c?dpf sent len=\"1\"?\u003e\u003c?dpf orth code=\"unknown\" prop=\"Lesen;Lehnen;Lehren;Leasen;Leisen\" ?\u003elehsen\u003c?dpf /orth ?\u003e~~~\u003c?dpf /sent ?\u003e";
$response = preg_replace("/\\\\u([0-9a-f]{3,4})/i", "&#x\\1;", $response );
$response = html_entity_decode($response , null, 'UTF-8');
$response = str_replace([ '<?dpf ', ' ?>', '?>' ], [ '<', '>', '>' ], $response);
echo substr($response, 36-1);
preferences:
38.74 ms | 402 KiB | 5 Q