Loops + Arrays = ForEach -- why unset $lang?


Hi - Why do we need to unset $lang in this example? Is that common practice, to unset variables when you're done using them?:

Languages you can learn on Codecademy:

    $langs = array("JavaScript",
    "HTML/CSS", "PHP",
    "Python", "Ruby");
      foreach ($langs as $lang) {
          echo "<li>$lang</li>";



IMHO the unset() is not needed in this case....
read the manual