What is the difference between unsetting a value in $_GET and removing the entire parameter in PHP?

When unsetting a value in $_GET, you are removing a specific key-value pair from the $_GET superglobal array. This means that the parameter still exists, but with one less value. On the other hand, removing the entire parameter in PHP means completely removing the parameter and its values from the URL. To unset a value in $_GET: unset($_GET['parameter_name']); To remove the entire parameter in PHP: unset($_GET['parameter_name']);