title: Find a space in UTF-8 strings, do I need mb_strpos?
body: <p>I have a string in UTF-8. </p>
  
  <pre><code>$string = "ãçé êíõ";
  </code></pre>
  
  <p>I need to find the position of the space.
  I have to use <code>mb_strpos($string,' ');</code> ?</p>