title: Question mark in PHP CURL response
body: <p>i want to use one site with API,
  i have this code:</p>
  
  <pre><code>$ch=curl_init('http://example.com/?api=**');
  $options = array(
      CURLOPT_RETURNTRANSFER =&gt; true,
      CURLOPT_HTTPHEADER =&gt; array('text/plain;charset=UTF-8') ,
  );
  
  curl_setopt_array( $ch, $options );
  $results=curl_exec($ch);
  var_dump($results);
  </code></pre>
  
  <p>but i see <code>?</code> instead of some characters like <code>”</code>, <code>»</code> .
  i checked source page and charset is utf-8..
  what is problem?</p>