title: PHP Rename file which have unrecognized charactor
body: <p>I'm trying to rename a file, </p>
  
  <p>That file generated by unizp a zip file,
  but the file have a strange character</p>
  
  <pre><code>Lieferungen und R�cklieferungen_RvP_2019_02_04.csv
  </code></pre>
  
  <p>we can't have control over that character becoz we getting zip file from 3rd party. </p>
  
  <p>that symbol is <strong>ü</strong>  but when unzip using php code it shows that strange symbol.</p>
  
  <p>I tried using this code</p>
  
  <pre><code>$files = glob("/xxxxmyfullpath/unzipped/*.csv");
  echo $numfiles = count($files);
  
  if ($numfiles == 1) {
    // Rename it
    echo $files[0];
    rename($files[0], "testing.csv");
  }
  </code></pre>
  
  <p>but the <strong>glob</strong> doesn't seems identify the file.</p>
  
  <p>anyone know how to remove that unrecognized symbol from file name please </p>