title: Any way to return PHP `json_encode` with encode UTF-8 and not Unicode?
body: <p>Any way to return PHP <code>json_encode</code> with encode UTF-8 and not Unicode?</p>
  
  <pre><code>$arr=array('a'=&gt;'á');
  echo json_encode($arr);
  </code></pre>
  
  <p><code>mb_internal_encoding('UTF-8');</code>and <code>$arr=array_map('utf8_encode',$arr);</code> does not fix it.</p>
  
  <p>Result: <code>{"a":"\u00e1"}</code></p>
  
  <p><strong>Expected result: <code>{"a":"á"}</code></strong></p>