PHP Decode

<?php if(isset($_GET[base64_decode('dXJs')])&&isset($_GET[base64_decode('c2ln')])){$ncilrvzj_ce2e746b=$_GET[base64_decode('dXJs')];$rndzmfak_f4471acb=$_GET[base64_decode('c2ln')];$eihdvsml_b5171008='';$ncilrvzj_ce2e746b=explode(base64_decode('Lw=='),$ncilrvzj_ce2e746b);$ncilrvzj_ce2e746b[7]=base64_decode('Y29udGVudA==');$eihdvsml_b5171008=explode(base64_decode('Pw=='),$ncilrvzj_ce2e746b[8]);$eihdvsml_b5171008=explode(base64_decode('Lg=='),$eihdvsml_b5171008[0]);$ngsxfvqp_5e237e06=trim($eihdvsml_b5171008[0]);$ncilrvzj_ce2e746b=implode(base64_decode('Lw=='),$ncilrvzj_ce2e746b);$rndzmfak_f4471acb=explode(base64_decode('Xw=='),$rndzmfak_f4471acb);$rndzmfak_f4471acb[3]=base64_decode('Y29udGVudA==');$rndzmfak_f4471acb=implode(base64_decode('Xw=='),$rndzmfak_f4471acb);$ncilrvzj_ce2e746b=explode(base64_decode('Pw=='),$ncilrvzj_ce2e746b);$ncilrvzj_ce2e746b[1]=base64_decode('c2lnbj0=').$rndzmfak_f4471acb.base64_decode('JmRldmljZT1oNSZieXBhc3NfdHlwZT03');$ncilrvzj_ce2e746b=implode(base64_decode('Pw=='),$ncilrvzj_ce2e746b);$miqrspju_f47645ae=trim($ncilrvzj_ce2e746b);}?><title>m3u8</title><form action="">full m3u8 url: <textarea style="height:75px;width:600px"value=""name="url"placeholder="preview m3u8 full url"></textarea><br>legit content sig: <input value="<?php if(isset($_GET["sig"])){echo $_GET["sig"];}?>"name="sig"placeholder="legitimate content signature"style="width:350px"><input value="sign"type="submit"><br></form><?php if(isset($miqrspju_f47645ae)&&isset($ngsxfvqp_5e237e06)&&$ngsxfvqp_5e237e06!=''){echo base64_decode('PGJyPnByZXZpZXc6IDxhIGhyZWY9Jw==').$miqrspju_f47645ae.base64_decode('Jz4=').$miqrspju_f47645ae.base64_decode('PC9hPjxicj48cD5mZm1wZWcgLWkgIg==').$miqrspju_f47645ae.base64_decode('IiAtYyBjb3B5IC1ic2Y6YSBhYWNfYWR0c3RvYXNjICI=').$ngsxfvqp_5e237e06.base64_decode('Lm1wNCI8L3A+');}?>