title: Convert unicode special characters to UTF-8
body: <p>I have problem with converting unicode characters to utf-8.
  Here is my code:</p>
  
  <pre><code>&lt;?php 
      $unicode = '\u0411. \u0426\u044d\u0446\u044d\u0433\u0441\u04af\u0440\u044d\u043d';
  
      $utf8string = html_entity_decode(preg_replace("/U\+([0-9A-F]{4})/", "&amp;#x\\1;", $unicode), ENT_NOQUOTES, 'UTF-8');
  
      echo $utf8string;
  ?&gt;
  </code></pre>
  
  <p>And it gives me below:</p>
  
  <pre><code>\u0411. \u0426\u044d\u0446\u044d\u0433\u0441\u04af\u0440\u044d\u043d
  </code></pre>
  
  <p>What did i do wrong ? any advice ? </p>