Add header rich snippets to your Magento Store

head.phtml

<?php
/**
 *
 * Copyright (c) 2013 Studio Boz
 *
 * @project_name Studio Boz
 * @copyright    Copyright (c) 2013 Studio Boz (http://studioboz.com.br)
 * @author       Rick Benetti <rick@studioboz.com.br>
 *
 **/
 ?>
 
<title><?php echo $this->getTitle() ?></title>


<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=yes"/>

<meta http-equiv="cleartype" content="on" />
<meta name="robots" content="<?php echo htmlspecialchars($this->getRobots()) ?>" />
<link rel="icon" href="<?php echo $this->getFaviconFile(); ?>" type="image/x-icon" />
<link rel="shortcut icon" href="<?php echo $this->getFaviconFile(); ?>" type="image/x-icon" />

<?php echo $this->getChildHtml('rich.snippets'); ?>

local.xml

<?xml version="1.0"?>
<!--
/**
 *
 * Copyright (c) 2013 Studio Boz
 *
 * @project_name Studio Boz
 * @copyright    Copyright (c) 2013 Studio Boz (http://studioboz.com.br)
 * @author       Rick Benetti <rick@studioboz.com.br>
 *
 **/
-->
  <layout version="0.1.0">
    <default>
      <reference name="head">
        <block type="core/template" name="rich.snippets" template="page/html/header/rich.snippets.phtml" />
      </reference>
    </default>
  </layout>

rich-snippets.phtml

<?php
/**
 *
 * Copyright (c) 2013 Studio Boz
 *
 * @project_name Studio Boz
 * @copyright    Copyright (c) 2013 Studio Boz (http://studioboz.com.br)
 * @author       Rick Benetti <rick@studioboz.com.br>
 *
 **/
 ?>

<?php
    $_storeId = Mage::app()->getStore()->getId();
    $_helper = $this->helper('catalog/output');
    $product = $this->getProduct();
    //$productUrl = $product->getUrlModel()->getUrl($product, array('_ignore_category' => true));
    $currency = Mage::app()->getLocale()->currency(Mage::app()->getStore()->getCurrentCurrencyCode())->getSymbol();
    $_twitter_username = Mage::getModel('core/variable')->setStoreId($_storeId)->loadByCode('twitter_username')->getValue('plain');
    if ($product):
    $productUrl = $product->getProductUrl();
?>
    <meta itemprop="url" content="<?php echo $productUrl; ?>" />
    <meta itemprop="sku" content="<?php echo $this->getSku() ?>" />
    <meta itemprop="price" content="<?php echo number_format($this->getPrice(), 2);?>" />
    <meta itemprop="priceCurrency" content="<?php echo Mage::app()->getStore()->getCurrentCurrencyCode();?>" />
<?php if ($this->getReviewsCount()) : ?>
    <meta itemprop="ratingValue" content="<?php echo $this->getRatingSummary(); ?>"/>
    <meta itemprop="reviewCount" content="<?php echo $this->getReviewsCount(); ?>" />
    <meta itemprop="bestRating" content="100"/>
    <meta itemprop="worstRating" content="0"/>
<?php endif; ?>
    <!-- Facebook - Open Graph -->
    <meta property="og:title" content="<?php echo Mage::app()->getWebsite()->getName(); ?>" />
    <meta property="og:type" content="product" />
    <meta property="og:url" content="<?php echo $productUrl; ?>" />
    <meta property="og:price:amount" content="<?php echo Mage::helper('tax')->getPrice($this, $this->getFinalPrice(), true); ?>" />
    <meta property="og:price:currency" content="<?php echo Mage::app()->getStore()->getCurrentCurrencyCode() ?>" />
    <meta property="og:image" content="<?php echo $this->helper('catalog/image')->init($this, 'image')->resize(600,315); ?>" />
    <meta property="og:description" content="<?php echo strip_tags($this->getShortDescription()); ?>" />
    <meta property="og:site_name" content="<?php echo Mage::app()->getWebsite()->getName(); ?>" />
    <meta property="og:availability" content="<?php echo ($product->isAvailable()) ? 'in stock' : 'out of stock'; ?>" />
    <!-- Twitter - Card -->
     <meta name="twitter:site" content="@<?php echo $_twiter_username; ?>" />
     <meta name="twitter:card" content="product">
     <meta name="twitter:url" content="<?php echo $productUrl; ?>">
     <meta name="twitter:title" content="<?php echo Mage::app()->getWebsite()->getName(); ?>">
     <meta name="twitter:description" content="<?php echo strip_tags($this->getShortDescription()); ?>">
     <meta name="twitter:image" content="<?php echo $this->helper('catalog/image')->init($this, 'image')->resize(280,150); ?>">
     <!-- Google Plus -->
     <meta itemprop="description" content="<?php echo strip_tags($this->getShortDescription()); ?>">
     <meta itemprop="image" content="<?php echo $this->helper('catalog/image')->init($this, 'image')->resize(600,600); ?>">
     <meta itemprop="name" content="<?php echo Mage::app()->getWebsite()->getName(); ?>">
     <meta itemprop="url" content="<?php echo $this->helper('catalog/product')->getProductUrl($this); ?>">


<?php else: ?>
    <!-- Facebook - Open Graph -->
    <meta property="og:title" content="<?php echo $this->getLayout()->getBlock('head')->getTitle() .' « '. Mage::app()->getWebsite()->getName(); ?>" />
    <meta property="og:type" content="store" />
    <meta property="og:url" content="<?php echo Mage::helper('core/url')->getCurrentUrl();?>" />
    <meta property="og:image" content="<?php echo $this->getSkinUrl('images/logo.png') ?>" />
    <meta property="og:description" content="<?php echo htmlspecialchars($this->getDescription()) ?>" />
    <meta property="og:site_name" content="<?php echo Mage::app()->getWebsite()->getName(); ?>" />

    <!-- Twitter - Card -->
     <meta name="twitter:site" content="@<?php echo $_twitter_username; ?>" />
     <meta name="twitter:card" content="summary">
     <meta name="twitter:url" content="<?php echo Mage::helper('core/url')->getCurrentUrl();?>">
     <meta name="twitter:title" content="<?php echo $this->getLayout()->getBlock('head')->getTitle() .' « '. Mage::app()->getWebsite()->getName(); ?>">
     <meta name="twitter:description" content="<?php echo htmlspecialchars($this->getDescription()) ?>">
     <meta name="twitter:image" content="<?php echo $this->getSkinUrl('images/logo.png') ?>">

     <!-- Google Plus -->
     <meta itemprop="description" content="<?php echo htmlspecialchars($this->getDescription()) ?>">
     <meta itemprop="image" content="<?php echo $this->getSkinUrl('images/logo.png') ?>">
     <meta itemprop="name" content="<?php echo Mage::app()->getWebsite()->getName(); ?>">
     <meta itemprop="url" content="<?php echo Mage::helper('core/url')->getCurrentUrl();?>">
<?php endif; ?>