https

Step 1: Deciding on the SSL protocol whether the site using http or https.

if(isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] === 'on') {
   $url = 'https';
} else {
   $url = 'http';
}

Step 2: Append domain name or IP to the URL

$url .= $_SERVER['HTTP_HOST'];

Step 3: Append the current page URL after domain / IP

$url .= $_SERVER[‘REQUEST_URI’]

Step 4: Let’s put all these together and create a function that can be reused.

function getfullpageurl() {
    if(isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] === 'on')   
         $url = "https://";   
    else  
         $url = "http://";   
       
    $url.= $_SERVER['HTTP_HOST'];   
    
    $url.= $_SERVER['REQUEST_URI'];    
      
    return $url;  
}