Code refactoring (add autoloader and change files organization)

app/Core/Request.php

@@ -0,0 +1,56 @@
+<?php
+
+namespace Core;
+
+class Request
+{
+    public function getStringParam($name, $default_value = '')
+    {
+        return isset($_GET[$name]) ? $_GET[$name] : $default_value;
+    }
+
+    public function getIntegerParam($name, $default_value = 0)
+    {
+        return isset($_GET[$name]) && ctype_digit($_GET[$name]) ? (int) $_GET[$name] : $default_value;
+    }
+
+    public function getValue($name)
+    {
+        $values = $this->getValues();
+        return isset($values[$name]) ? $values[$name] : null;
+    }
+
+    public function getValues()
+    {
+        if (! empty($_POST)) return $_POST;
+
+        $result = json_decode($this->getBody(), true);
+        if ($result) return $result;
+
+        return array();
+    }
+
+    public function getBody()
+    {
+        return file_get_contents('php://input');
+    }
+
+    public function getFileContent($name)
+    {
+        if (isset($_FILES[$name])) {
+            return file_get_contents($_FILES[$name]['tmp_name']);
+        }
+
+        return '';
+    }
+
+    public function isPost()
+    {
+        return isset($_SERVER['REQUEST_METHOD']) && $_SERVER['REQUEST_METHOD'] === 'POST';
+    }
+
+    public function isAjax()
+    {
+        return isset($_SERVER['HTTP_X_REQUESTED_WITH']) && $_SERVER['HTTP_X_REQUESTED_WITH'] === 'XMLHttpRequest';
+    }
+}