PHP Decode

<?php 
 
error_reporting(0); 
 
classCloudSEK{ 
 
private$func_no; 
private$func_name; 
 
function__construct($no,$name){ 
if($no==NULL&&$name==NULL){ 
$this->func_no=$no; 
$this->func_name=$name; 
} 
} 
 
function__wakeup(){ 
$func_map=array( 
1=>"XVigil", 
2=>"BeVigil", 
3=>"GetMeDemFlagz", 
); 
 
$func_no=$this->func_no; 
$func_name=str_rot13($this->func_name); 
 
if($func_map[$func_no]===$func_name){ 
$this->$func_name(); 
} 
else{ 
echo"<h3>InvalidObjectData</h3>"; 
} 
} 
 
functionXVigil(){ 
echo"<h3>XVigilisacybersecurityplatformdesignedtohelporganizationsmonitorandmitigatepotentialsecuritythreatsandvulnerabilitiesacrossthedigitallandscape.</h3>"; 
} 
 
functionBeVigil(){ 
echo"<h3>World'sfirstSecuritySearchEnginemobilesthatmakessuretheapplicationsinstalledinyourphonearesafe.</h3>"; 
} 
 
functionGetMeDemFlagz(){ 
$flag_file="/tmp/flag.txt"; 
if(file_exists($flag_file)){ 
$file_contents=file_get_contents($flag_file); 
echo$file_contents; 
} 
else{ 
$err_msg="<h3>FileNotFound!</h3>"; 
$file_contents=$err_msg; 
echo$err_msg; 
} 
} 
} 
 
//$cloudsek=newCloudSEK(1,"XVigil"); 
$sess=$_GET["sess"]; 
if(!isset($sess)){ 
exit(); 
} 
$data=base64_decode($sess); 
$obj=unserialize($data); 
 
?>