我正在尝试使用$current_url = basename($_SERVER['PHP_SELF']);为了确定我在哪个页面，考虑到我的导航（html）存储在 php 文件中并包含在每个页面中。这是我用来确定哪个导航选项应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 $Agent?>" method="POST">
<input type="password" name="1" placeholder="Enter new password">
<input type="password" name="2" placeholder="Repeat new password">
</li>
<li>
<input type="submit" name="changepw" class="button" value="Change">
</form>
</li>
</ul>
</li>
<li>
<form action="logout.php">
<input type="submit" class="button" value="Log out">
</form>
</li>
</ul>
</li>
但这不起作用。它将活动页面显示为活动页面，但将 2 个页面显示为简单的超链接。它看起来是这样的：
有谁知道为什么会发生这种情况？它对 2 有效，但对 2 失败，完全相同的代码？ 谢谢
你应该这样做：
<li <?php echo ($current_url == "globaluser.php") ? $active : ''?> ><a href="globaluser.php?Agent=<?php echo $Agent;?>">Overview</a></li>
因为现在你正在调节开口的存在<li> tag