我正在尝试使用$current_url = basename($_ SERVER [‘ PHP_SELF’]);考虑到我的导航(htML)存储在PHP文件中并包含在每个页面中,以确定我所在的页面.这是我用来确定哪个导航选项应该处于活动状态的代码：

<link rel="stylesheet" href="css/style.css">
<link rel="stylesheet" href="css/no-background.css">

<ul>
<?PHP
    $current_url = basename($_SERVER['PHP_SELF']);
    $active = "class=\"active\"";
?>
<?PHP if ($current_url == "globaluser.PHP") { ?>
    <li <?PHP echo $active;?> > <?PHP } ?> <a href="globaluser.PHP?Agent=<?PHP echo $Agent;?>">Overview</a></li>
<?PHP if ($current_url == "seArch.PHP") { ?>
    <li <?PHP echo $active;?> > <?PHP } ?> <a href="search.PHP?Agent=<?PHP echo $Agent?>">Add new client</a></li>
<?PHP if ($current_url == "viewadmins.PHP") { ?>
    <li <?PHP echo $active;?> > <?PHP } ?> <a href="viewadmins.PHP?Agent=<?PHP echo $Agent?>">View admins</a></li>
    <li class="border-right"><a href="emails.PHP?Agent=<?PHP echo $Agent?>">E-mails</a></li>
    <li class="right border-right"><a href="logout.PHP"><?PHP echo $Agent?></a>
        <ul class="drop1">
            <li><a href="earnings.PHP?Agent=<?PHP echo $Agent?>">Earnings</a></li>
            <li id="hover-trigger"><a href="#">Change Password</a>
                <ul class="drop2">
                    <li>
                        <form action="changepass.PHP?Agent=<?PHP echo $Agent?>" method="POST">
                            <input tyPE="password" name="1" placeholder="Enter new password">
                            <input type="password" name="2" placeholder="Repeat new password">
                    </li>
                    <li>
                            <input type="submIT" name="changepw" class="button" value="Change">
                        </form>
                    </li>
                </ul>
            </li>
        <li>
            <form action="logout.PHP">
                <input type="submit" class="button" value="LOG out">
            </form>
        </li>
        </ul>
    </li>

但它不起作用.它将活动页面显示为活动页面,但是,它显示2页作为简单的超链接.这就是它的样子：

有没有人知道为什么会这样？它适用于2,但是2,完全相同的代码失败？
谢谢

<li <?PHP echo ($current_url == "globaluser.PHP") ? $active : ''?> ><a href="globaluser.PHP?Agent=<?PHP echo $Agent;?>">Overview</a></li>