<?php
 
 
 
   $url = $_SERVER['HTTP_HOST'];
 
        $parsedUrl = parse_url($url);
        if(isset($parsedUrl['host'])) {
            $host = $parsedUrl['host'];
        } else {
            $host = $parsedUrl['path'];
        }
        
        $parts = explode('.', $host);
        $domainName = $parts[1];  

 

    
      
?>