What are some alternative methods to retrieve and display the current URL in PHP for linking images dynamically?

When linking images dynamically in PHP, it is important to retrieve and display the current URL correctly. One alternative method to achieve this is by using the $_SERVER['REQUEST_URI'] variable to get the current URL. This variable contains the path and query string of the current URL. 

$currentURL = "http://$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";
echo $currentURL;

Keywords

$_SERVER parse_url $_SERVER['REQUEST_URI'] $_SERVER['HTTP_HOST'] $_SERVER['QUERY_STRING']

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