Added helpers.php file

- Added updated helpers.php file
- Updated helpers section in documentation.

helpers.php

@@ -0,0 +1,66 @@
+<?php
+
+use Pecee\SimpleRouter\SimpleRouter as Router;
+
+/**
+ * Get url for a route by using either name/alias, class or method name.
+ *
+ * The name parameter supports the following values:
+ * - Route name
+ * - Controller/resource name (with or without method)
+ * - Controller class name
+ *
+ * When searching for controller/resource by name, you can use this syntax "route.name@method".
+ * You can also use the same syntax when searching for a specific controller-class "MyController@home".
+ * If no arguments is specified, it will return the url for the current loaded route.
+ *
+ * @param string|null $name
+ * @param string|array|null $parameters
+ * @param array|null $getParams
+ * @return string
+ */
+function url($name = null, $parameters = null, $getParams = null)
+{
+    return Router::getUrl($name, $parameters, $getParams);
+}
+
+/**
+ * @return \Pecee\Http\Response
+ */
+function response()
+{
+    return Router::response();
+}
+
+/**
+ * @return \Pecee\Http\Request
+ */
+function request()
+{
+    return Router::request();
+}
+
+/**
+ * Get input class
+ * @param string|null $index Parameter index name
+ * @param string|null $defaultValue Default return value
+ * @param string|array|null $methods Default method
+ * @return \Pecee\Http\Input\Input|string
+ */
+function input($index = null, $defaultValue = null, $methods = null)
+{
+    if ($index !== null) {
+        return request()->getInput()->get($index, $defaultValue, $methods);
+    }
+
+    return request()->getInput();
+}
+
+function redirect($url, $code = null)
+{
+    if ($code !== null) {
+        response()->httpCode($code);
+    }
+
+    response()->redirect($url);
+}