<?php
// 示例代码：学生信息管理功能
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "school_management";
// 创建连接
$conn = new mysqli($servername, $username, $password, $dbname);
// 检测连接
if ($conn->connect_error) {
die("连接失败: " . $conn->connect_error);
}
// 添加学生信息
function addStudent($name, $age, $class) {
global $conn;
$sql = "INSERT INTO students (name, age, class) VALUES ('$name', '$age', '$class')";
if ($conn->query($sql) === TRUE) {
echo "新记录插入成功";
} else {
echo "错误: " . $sql . "<br>" . $conn->error;
}
}
// 查询学生信息
function getStudent($id) {
global $conn;
$sql = "SELECT * FROM students WHERE id=$id";
$result = $conn->query($sql);
if ($result->num_rows > 0) {
while($row = $result->fetch_assoc()) {
echo "ID: " . $row["id"]. " - Name: " . $row["name"]. " - Age: " . $row["age"]. " - Class: " . $row["class"]. "<br>";
}
} else {
echo "0 结果";
}
}
// 更新学生信息
function updateStudent($id, $name, $age, $class) {
global $conn;
$sql = "UPDATE students SET name='$name', age='$age', class='$class' WHERE id=$id";
if ($conn->query($sql) === TRUE) {
echo "记录更新成功";
} else {
echo "错误: " . $sql . "<br>" . $conn->error;
}
}
// 删除学生信息
function deleteStudent($id) {
global $conn;
$sql = "DELETE FROM students WHERE id=$id";
if ($conn->query($sql) === TRUE) {
echo "记录删除成功";
} else {
echo "错误: " . $sql . "<br>" . $conn->error;
}
}
// 关闭连接
$conn->close();
?>
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