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Correction status：qualified
Teacher's comments：
Collection
Collection
PHP就是服务器端用来把PHP文件转换成服务器APpache能识别的HTML文档的超文本语言，是用户和数据库、服务器进行交互的编码器。
PHP变量的运用实例：
<?php
$title = '学生成绩管理系统';
$tableTitle = '学生成绩表';
$stu1 = [1,'小李','数学',90];
$stu2 = [2,'小红','数学',85];
$stu3 = [3,'小张','数学',95];
$stu4 = [4,'小王','数学',93];
$totel = 4;
?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title><?php echo $title ?></title>
<style>
table,th,td {
border: 1px solid #ccc;
padding: 8px;
}
table {
border-collapse: collapse;
width: 80%;
text-align: center;
margin: 30px auto;
}
thead tr:first-of-type {
background-color: lightblue;
}
tbody tr:hover {
background-color: #efefef;
}
table > caption {
font-size: 1.2rem;
margin-bottom: 15px;
}
table + p {
text-align: center;
}
</style>
</head>
<body>
<table>
<caption><?php echo $tableTitle ?></caption>
<thead>
<tr>
<th>学号</th>
<th>姓名</th>
<th>科目</th>
<th>成绩</th>
</tr>
</thead>
<tbody>
<?php
echo '<tr>';
echo "<td>{$stu1[0]}</td>";
echo "<td>{$stu1[1]}</td>";
echo "<td>{$stu1[2]}</td>";
echo "<td>{$stu1[3]}</td>";
echo '</tr>';
echo '<tr>';
echo "<td>{$stu2[0]}</td>";
echo "<td>{$stu2[1]}</td>";
echo "<td>{$stu2[2]}</td>";
echo "<td>{$stu2[3]}</td>";
echo '</tr>';
echo '<tr>';
echo "<td>{$stu3[0]}</td>";
echo "<td>{$stu3[1]}</td>";
echo "<td>{$stu3[2]}</td>";
echo "<td>{$stu3[3]}</td>";
echo '</tr>';
echo '<tr>';
echo "<td>{$stu4[0]}</td>";
echo "<td>{$stu4[1]}</td>";
echo "<td>{$stu4[2]}</td>";
echo "<td>{$stu4[3]}</td>";
echo '</tr>';
?>
</tbody>
</table>
<p>总计<?php echo $totel ?>人</p>
</body>
</html>点击 "运行实例" 按钮查看在线实例
