Autoload classes in HTTPStatus.php

- Use PSR-4 autoloading
- Clean up code and reduce complexity.

classes/HTTPStatus.php

-<?php
+<?php declare(strict_types=1);
 
 namespace uib\ub\loadspeakr;
 
 use stdClass;
 
-class HTTPStatus
+final class HTTPStatus
 {
-    public static function send303($uri, $ext)
+    public static function send303($uri, $ext): void
     {
         header("HTTP/1.0 303 See Other");
         header("Location: " . $uri);
         header("Content-type: " . $ext);
-        echo HTTPStatus::_getContent("303", $uri);
+        echo self::getContent("303", $uri);
         exit(0);
     }
 
-    public static function send401($uri)
+    public static function send401($uri): void
     {
         header("HTTP/1.0 401 Forbidden");
-        echo HTTPStatus::_getContent("401", $uri);
+        echo self::getContent("401", $uri);
         exit(0);
     }
 
-    public static function send404($uri)
+    public static function send404($uri): void
     {
         header("HTTP/1.0 404 Not Found");
         $alt = "LODSPeaKr couldn't find the resource " . $uri;
-        echo HTTPStatus::_getContent("404", $alt);
+        echo self::getContent("404", $alt);
         exit(0);
     }
 
-    public static function send406($uri)
+    public static function send406($uri): void
     {
         header("HTTP/1.0 406 Not Acceptable");
         $alt = "LODSPeaKr can't return content acceptable according to the Accept headers sent in the request for " . $uri;
-        echo HTTPStatus::_getContent("406", $alt);
+        echo self::getContent("406", $alt);
         exit(0);
     }
 
-    public static function send500($uri)
+    public static function send500($uri): void
     {
         header("HTTP/1.0 500 Internal Server Error");
         $alt = "There was an internal error when processing " . $uri;
-        echo HTTPStatus::_getContent("500", $alt);
+        echo self::getContent("500", $alt);
         exit(0);
     }
 
-    private static function _getContent($n, $alt)
+    private static function getContent($n, $alt): string
     {
         global $conf;
         global $lodspk;
@@ -61,10 +61,10 @@ class HTTPStatus
         $file = $conf['httpStatus']['directory'] . "/" . $n . ".template";
 
         if (file_exists($conf['home'] . $file)) {
-            require_once("Utils.php");
             Utils::showView($lodspk, new stdClass(), $file);
-        } else {
-            return $alt . "\n\n";
+            return '';
         }
+
+        return $alt . "\n\n";
     }
 }