$action = filter_input(INPUT_GET, 'action');

 

 function getBody()

 {

     $body = [];

  

     foreach ($_REQUEST as $key => $value) {

         $body[$key] = filter_var($value, FILTER_SANITIZE_SPECIAL_CHARS);

     }

  

     return $body;

 }

  

 $request = getBody();

 

 $action = $request['action'];

 

 

 $action = filter_input(INPUT_GET, 'action', FILTER_SANITIZE_SPECIAL_CHARS);

 

 $action = isset($_REQUEST['action']) ? $_REQUEST['action'] : null;

 

 $action = $_REQUEST['action'] ?? null;

 

 $action = null;

 if(isset($_REQUEST['action'])) $action = $_REQUEST['action'];