如何隐藏下拉菜单PHP中的选项？

<select>
  <option value="1">选项1</option>
  <option value="2" style="display:none;">选项2</option>
  <option value="3">选项3</option>
</select>

<select>
  <option value="1">选项1</option>
  <?php if ($hideOption2): ?>
    <option value="2">选项2</option>
  <?php endif; ?>
  <option value="3">选项3</option>
</select>

<select id="mySelect">
  <option value="1">选项1</option>
  <option value="2">选项2</option>
  <option value="3">选项3</option>
</select>

<script>
  var select = document.getElementById("mySelect");
  select.options[1].style.display = "none";
</script>