title: SEO Canonical URL in Greek characters
body: <p>I have a URL which including Greek letters</p>
  
  <p><code>http://www.mydomanain.com/gr/τιτλος-σελιδας/20/</code></p>
  
  <p>I am using <code>$_SERVER['REQUEST_URI']</code> to insert value to canonical link in my page head like this </p>
  
  <pre><code>&lt;link rel="canonical" href="http://www.mydomanain.com&lt;?php echo $_SERVER['REQUEST_URI']; ?&gt;" /&gt;
  </code></pre>
  
  <p>The problem is when I am viewing the page source the URL is displayed with characters like <code>...CE%B3%CE%B3%CE%B5%CE%BB...</code>but when clicking on it, its display the link as it should be</p>
  
  <p>Is this will caused any penalty from search engines?</p>