Php 引导下拉列表-在URL中显示id时不下拉
在我正在建设的网站上遇到了一个有趣的问题。当我到达包含id的url时，其中一个选项的下拉菜单将停止工作 举个例子，如果我在http://localhost/degs/serpstudentsinclass.php?id=3，如果单击“管理”下拉列表，则不会发生任何事情。如果我点击返回主页http://localhost/degs/index.php，管理员下拉菜单开始工作没有问题 在使用移动设备工作时，这也增加了一个额外的问题。一旦你到达http://localhost/degs/serpstudentsinclass.php?id=3，您将完全失去使用导航菜单的能力（因为现在由于屏幕大小，它是一个完整的下拉菜单）。因此，您必须再次返回index.php，然后菜单将再次开始工作 你有没有想过为什么会这样 头文件Php 引导下拉列表-在URL中显示id时不下拉,php,bootstrap-4,Php,Bootstrap 4,在我正在建设的网站上遇到了一个有趣的问题。当我到达包含id的url时，其中一个选项的下拉菜单将停止工作 举个例子，如果我在http://localhost/degs/serpstudentsinclass.php?id=3，如果单击“管理”下拉列表，则不会发生任何事情。如果我点击返回主页http://localhost/degs/index.php，管理员下拉菜单开始工作没有问题 在使用移动设备工作时，这也增加了一个额外的问题。一旦你到达http://localhost/degs/serpstu
<?php
// session file
include_once 'includes/session.php';?>
<!doctype html>
<html lang="en">
<head>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="../css/site.css" />
<link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@4.5.3/dist/css/bootstrap.min.css" integrity="sha384-TX8t27EcRE3e/ihU7zmQxVncDAy5uIKz4rEkgIXeMed4M0jlfIDPvg6uqKI2xXr2" crossorigin="anonymous">
<title><?php echo $title ?></title>
</head>
<body>
<div class="container">
<nav class="navbar navbar-expand-lg navbar-dark bg-primary">
<a class="navbar-brand" href="index.php">DEGS</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarNav">
<ul class="navbar-nav mr-auto">
<li class="nav-item">
<a class="nav-link" href="index.php">Home</a>
</li>
<li class="nav-item">
<a class="nav-link" href="serpentine.php">Serpentine</a>
</li>
<li class="nav-item">
<a class="nav-link" href="uturn_box.php">U-Turn Box</a>
</li>
<li class="nav-item">
<a class="nav-link" href="blocked_evasive.php">Blocked Evasive</a>
</li>
<li class="nav-item">
<a class="nav-link" href="forward_reverse.php">Forward Reverse</a>
</li>
<li class="nav-item">
<a class="nav-link" href="controlled_braking.php">Controlled Braking</a>
</li>
<li class="nav-item">
<a class="nav-link" href="cumulative_skills_day.php">Cumulative Skills - Day</a>
</li>
<li class="nav-item">
<a class="nav-link" href="cumulative_skills_night.php">Cumulative Skills - Night</a>
</li>
<li class="nav-item">
<a class="nav-link" href="evoc_challenge.php">Evoc Challenge</a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
Admin
</a>
<div class="dropdown-menu" aria-labelledby="navbarDropdown">
<a class="dropdown-item" href="users.php">Users</a>
<a class="dropdown-item" href="classes.php">Classes</a>
<a class="dropdown-item" href="students.php">Students</a>
<a class="dropdown-item" href="legends.php">Legend</a>
<a class="dropdown-item" href="tests.php">Tests</a>
</div>
</li>
</ul>
<ul class="navbar-nav ml-auto">
<li class="nav-item active">
<?php
if(!isset($_SESSION['userid'])){
?>
<a class="nav-link" href="login.php">Login <span class="sr-only">(current)</span></a>
<?php } else { ?>
<li class="nav-item"><a class="nav-link" href="logout.php">Logout <span class="sr-only">(current)</span></a></li>
<?php } ?>
</li>
</ul>
</div>
</nav>
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<?php
$title = "DEGS - Students";
require_once 'includes/header.php';
require_once 'includes/auth_check.php';
require_once 'db/conn.php';
if(!isset($_GET['id'])){
echo 'error';
} else {
$id = $_GET['id'];
$results = $admin->getStudents($id);
$class = $admin->getClassDetails($id);
$students = $admin->getStudents($id);
}
?>
<h1>Serpentine - Class <?php echo $class['class']?></h1>
<br/>
<br/>
<table class="table">
<tr>
<th>Last Name</th>
<th>First Name</th>
<th>Agency</th>
<th>Class</th>
<th># of Attempts</th>
<th>Student Operations</th>
</tr>
<?php while($r = $results->fetch(PDO::FETCH_ASSOC)) { ?>
<tr>
<td><?php echo $r['lname']?></td>
<td><?php echo $r['fname']?></td>
<td><?php echo $r['agency']?></td>
<td><?php echo $class[1]?></td>
<td><?php echo $serpentine->getAttemptCount($r['student_id']) ?></td>
<td>
<a href="serpview.php?id=<?php echo $r['student_id']?>" class="btn btn-primary">View Attempts</a>
<a href="serpadd.php?id=<?php echo $r['student_id']?>" class="btn btn-success">Add Attempt</a>
</td>
</tr>
<?php }?>
</table>
蛇形类
姓
名字
机构
等级
#尝试次数
学生操作