如何禁用下拉菜单

Question

这是我的静态下拉列表代码。如何禁用下拉列表或删除选择值的选项

<?php
    $designationsOptions = array('0'=> 'Select Weekly Day Off','Sunday' => 'Sunday','Monday' => 'Monday','Tuesday' => 'Tuesday','Wednesday' => 'Wednesday','Thursday' => 'Thursday','Friday' => 'Friday','Saturday' => 'Saturday');
    $designationsOptionsJs = 'id="shiftDayOff" class="form-control shiftDayOff"';
    echo "<div class='drop_shiftDayOff'>";
    echo form_dropdown('shiftDayOff', $designationsOptions,$shifts[0]['shiftDayOff'],$designationsOptionsJs);
    echo "</div>";
?>

Answer 1

您可以将以下字符串添加到$ designationsOptionsJs变量中：

$designationsOptionsJs += " disabled=disabled";

这应该有效。