1.创建展示所有数据的视图模板

student_list.php：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
    content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>学生列表</title>
</head>
<body>
<h2 align="center">学生信息表</h2>
<table border="1" cellpadding="5" cellspacing="0" align="center" width="60%">
    <tr bgcolor="#87ceeb">
        <th>ID</th>
        <th>姓名</th>
        <th>邮箱</th>
        <th>课程</th>
        <th>成绩</th>
    </tr>

    <?php foreach ($data as $stu): ?>
        <tr align="center">
            <td><?php echo $stu['id']; ?></td>
            <td><?php echo $stu['name']; ?></td>
            <td><?php echo $stu['email']; ?></td>
            <td><?php echo $stu['course']; ?></td>
            <td><?php echo $stu['grade']; ?></td>
        </tr>
    <?php endforeach;?>
</table>
<p align="center">共计：<?php echo count($data); ?>条记录</p>
</body>
</html>

2.创建展示单条记录的视图模板

student_info.php：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>学生信息</title>
</head>
<body>
<h2 align="center">学生信息</h2>
<table border="1" cellpadding="5" cellspacing="0" align="center" width="60%">
   <tr align="center" bgcolor="#87ceeb">
       <th>字段</th>
       <th>值</th>
   </tr>
   <tr align="center">
       <td>id</td>
       <td><?php echo $data['id']; ?></td>
   </tr>
   <tr align="center">
       <td>姓名</td>
       <td><?php echo $data['name']; ?></td>
   </tr>
   <tr align="center">
       <td>邮箱</td>
       <td><?php echo $data['email']; ?></td>
   </tr>
   <tr align="center">
       <td>课程</td>
       <td><?php echo $data['course']; ?></td>
   </tr>
   <tr align="center">
       <td>成绩</td>
       <td
           <?php
           if ($data['grade'] < 60) {
               echo 'style="color:red"';
           }
           ?>
       >
           <?php echo $data['grade']; ?>
       </td>
   </tr>
</table>
<p align="center"
    <?php
    if ($data['grade'] < 60) {
        echo 'style="color:red"';
    }
    ?>
>
    <?php
    if ($data['grade'] < 60) {
        echo '不及格，需要补考~~';
    } else {
        echo '恭喜及格~~';
    }
    ?>
</p>
</body>
</html>
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项目目录结构如下：
在这里插入图片描述

3.引入视图模板

修改StudentController.php中的方法，引入新创建的视图模板。

    /**
     * 获取所有数据
     * @return mixed
     */
    public function listAll()
    {
        // 实例化模型，获取数据
        $stu = new StudentModel();
        $data = $stu->getAll();
        // 格式化
        //echo '<pre>';
        //print_r($data);
        require_once 'view/student_list.php'; // 渲染模板
        //return $data;
    }

    /**
     * 获取单条数据
     * @return mixed
     */
    public function info($id=1)
    {
        $id = isset($_GET['id']) ? $_GET['id'] : $id;
        // 实例化模型，获取数据
        $stu = new StudentModel();
        $data = $stu->get($id);
        //echo '<pre>';
        //print_r($data);
        require_once 'view/student_info.php'; // 渲染模板
        //return $data;
    }
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