帮我用php写一个学生管理
时间: 2023-10-08 12:05:51 浏览: 50
好的,学生管理系统通常包括以下功能:
1. 添加学生信息
2. 修改学生信息
3. 删除学生信息
4. 查询学生信息
下面是一个简单的学生管理系统的代码示例:
```php
<?php
// 连接数据库
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "students";
$conn = new mysqli($servername, $username, $password, $dbname);
if ($conn->connect_error) {
die("连接失败: " . $conn->connect_error);
}
// 处理学生信息
if ($_SERVER["REQUEST_METHOD"] == "POST") {
// 添加学生信息
if (isset($_POST["add"])) {
$name = $_POST["name"];
$age = $_POST["age"];
$gender = $_POST["gender"];
$sql = "INSERT INTO student_info (name, age, gender) VALUES ('$name', '$age', '$gender')";
if ($conn->query($sql) === TRUE) {
echo "添加成功";
} else {
echo "添加失败: " . $conn->error;
}
}
// 更新学生信息
if (isset($_POST["update"])) {
$id = $_POST["id"];
$name = $_POST["name"];
$age = $_POST["age"];
$gender = $_POST["gender"];
$sql = "UPDATE student_info SET name='$name', age='$age', gender='$gender' WHERE id='$id'";
if ($conn->query($sql) === TRUE) {
echo "更新成功";
} else {
echo "更新失败: " . $conn->error;
}
}
// 删除学生信息
if (isset($_POST["delete"])) {
$id = $_POST["id"];
$sql = "DELETE FROM student_info WHERE id='$id'";
if ($conn->query($sql) === TRUE) {
echo "删除成功";
} else {
echo "删除失败: " . $conn->error;
}
}
}
// 查询学生信息
$sql = "SELECT * FROM student_info";
$result = $conn->query($sql);
?>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>学生管理系统</title>
</head>
<body>
<h1>学生管理系统</h1>
<!-- 添加学生信息表单 -->
<h2>添加学生信息</h2>
<form method="post">
<label for="name">姓名:</label>
<input type="text" name="name" required>
<br><br>
<label for="age">年龄:</label>
<input type="number" name="age" required>
<br><br>
<label for="gender">性别:</label>
<input type="radio" name="gender" value="男" required>男
<input type="radio" name="gender" value="女" required>女
<br><br>
<input type="submit" name="add" value="添加">
</form>
<!-- 更新学生信息表单 -->
<h2>更新学生信息</h2>
<form method="post">
<label for="id">学生ID:</label>
<input type="number" name="id" required>
<br><br>
<label for="name">姓名:</label>
<input type="text" name="name" required>
<br><br>
<label for="age">年龄:</label>
<input type="number" name="age" required>
<br><br>
<label for="gender">性别:</label>
<input type="radio" name="gender" value="男" required>男
<input type="radio" name="gender" value="女" required>女
<br><br>
<input type="submit" name="update" value="更新">
</form>
<!-- 删除学生信息表单 -->
<h2>删除学生信息</h2>
<form method="post">
<label for="id">学生ID:</label>
<input type="number" name="id" required>
<br><br>
<input type="submit" name="delete" value="删除">
</form>
<!-- 显示学生信息表格 -->
<h2>学生信息列表</h2>
<table border="1">
<tr>
<th>ID</th>
<th>姓名</th>
<th>年龄</th>
<th>性别</th>
</tr>
<?php
if ($result->num_rows > 0) {
// 输出数据
while($row = $result->fetch_assoc()) {
echo "<tr><td>" . $row["id"]. "</td><td>" . $row["name"] . "</td><td>"
. $row["age"]. "</td><td>" . $row["gender"]. "</td></tr>";
}
} else {
echo "0 结果";
}
$conn->close();
?>
</table>
</body>
</html>
```
这个学生管理系统使用了 PHP 和 MySQL 数据库。你可以根据自己的需要进行修改和扩展。