javascript - Jquery add li class active

Question

Need add class to li

admin.tpl:

<ul class="nav nav-tabs">
<li><a href="admin.php">{"_MENUINFO"|lang}</a></li>
<li><a href="admin.php?site=ban_add">{"_ADDBAN"|lang}</a></li>
<li><a href="admin.php?site=ban_add_online">{"_ADDBANONLINE"|lang}</a></li>
</ul>

if example.com/admin.php need

<li class="active"><a href="admin.php">{"_MENUINFO"|lang}</a></li>
<li><a href="admin.php?site=ban_add">{"_ADDBAN"|lang}</a></li>
<li><a href="admin.php?site=ban_add_online">{"_ADDBANONLINE"|lang}</a></li>

example.com/admin.php?site=ban_add

<li><a href="admin.php">{"_MENUINFO"|lang}</a></li>
<li class="active"><a href="admin.php?site=ban_add">{"_ADDBAN"|lang}</a></li>
<li><a href="admin.php?site=ban_add_online">{"_ADDBANONLINE"|lang}</a></li>

end etc.. Please help!

Does not work

<li class="<?php if ($page=="admin.php") echo "active"?>">

Answer 1

On click on link page will refresh then you can use php GET to get page name and set active class on li as below :

<?php

if (isset($_GET['site'])) {
    switch ($_GET['site']) {
        case 'ban_add':
            $activeClass1 = 'active';
            break;
        case 'ban_add_online':
            $activeClass2 = 'active';
            break;
        default:
            $activeClass = 'active';
            break;
    }
}
?>

<li class="<?php echo $activeClass; ?>"><a href="admin.php" >{"_MENUINFO"|lang}</a></li>
<li class="<?php echo $activeClass1; ?>"><a href="admin.php?site=ban_add">{"_ADDBAN"|lang}</a></li>
<li class="<?php echo $activeClass2; ?>"><a href="admin.php?site=ban_add_online">{"_ADDBANONLINE"|lang}</a></li>