title: Copy file content to another file
body: <p>My file contains this content (1.txt):</p>
  
  <ul>
  <li>user.php?id=XXXXXX</li>
  <li>user.php?id=XXXXXX</li>
  <li>user.php?id=XXXXXX</li>
  <li>user.php?id=XXXXXX</li>
  <li>user.php?id=XXXXXX</li>
  <li>text/numbers</li>
  <li>user.php?id=XXXXXX</li>
  <li>user.php?id=XXXXXX</li>
  <li>and so on ...</li>
  </ul>
  
  <p>(XXXXXX = numbers)</p>
  
  <p>It's possible to take only user.php?id=XXXXXX and copy them to another file, without coping unnecessary text because file contains about 50 000 lines ?</p>