Add Form\Element\Radio

needed in 1.2.x 

cf phalcon/cphalcon#1646 (comment)

Forms/Element/Radio.php

@@ -0,0 +1,57 @@
+<?php
+/*
+  +------------------------------------------------------------------------+
+  | Phalcon Framework                                                      |
+  +------------------------------------------------------------------------+
+  | Copyright (c) 2011-2012 Phalcon Team (http://www.phalconphp.com)       |
+  +------------------------------------------------------------------------+
+  | This source file is subject to the New BSD License that is bundled     |
+  | with this package in the file docs/LICENSE.txt.                        |
+  |                                                                        |
+  | If you did not receive a copy of the license and are unable to         |
+  | obtain it through the world-wide-web, please send an email             |
+  | to license@phalconphp.com so we can send you a copy immediately.       |
+  +------------------------------------------------------------------------+
+  | Authors: Andres Gutierrez <andres@phalconphp.com>                      |
+  |          Eduar Carvajal <eduar@phalconphp.com>                         |
+  |          Nikita Vershinin <endeveit@gmail.com>                         |
+  |          Ludomir Crotet <lcrotet@voyageprive.comm>                     |
+  |          Olivier Garbé <ogarbe@voyageprive.com>                        |
+  +------------------------------------------------------------------------+
+*/
+
+namespace Phalcon\Forms\Element {
+
+	/**
+	 * Phalcon\Forms\Element\Radio
+	 *
+	 * Component INPUT[type=radio] for forms
+	 */
+
+	class Radio extends \Phalcon\Forms\Element implements \Phalcon\Forms\ElementInterface {
+
+		/**
+		 * \Phalcon\Forms\Element constructor
+		 *
+		 * @param string $name
+		 * @param array $attributes
+		 */
+		public function __construct($name, $attributes=null) {
+            parent::__construct($name, $attributes);
+        }
+
+		/**
+		 * Renders the element widget returning html
+		 *
+		 * @param array $attributes
+		 * @return string
+		 */
+		public function render($attributes = null){
+            $render = '';
+            foreach ($attributes->set->items as $key => $item) {
+                $render .= \Phalcon\Tag::radioField(array($this->getName(), 'value' => $key)).'&nbsp;'.$item.'&nbsp;';
+            }
+            return $render;
+        }
+	}
+}