<?php

// 数据库配置信息

$db_host = 'localhost';

$db_user = 'root';

$db_pass = '';

$db_name = 'student_work_management';

// 创建数据库连接

$conn = new mysqli($db_host, $db_user, $db_pass, $db_name);

if ($conn->connect_error) {

die("连接失败: " . $conn->connect_error);

}

// 用户登录验证

function checkLogin($username, $password) {

global $conn;

$sql = "SELECT * FROM users WHERE username='$username' AND password='$password'";

数据分析

$result = $conn->query($sql);

if ($result->num_rows > 0) {

return true;

} else {

return false;

}

}

// 添加新用户

function addUser($username, $password, $role) {

global $conn;

$sql = "INSERT INTO users (username, password, role) VALUES ('$username', '$password', '$role')";

if ($conn->query($sql) === TRUE) {

echo "新用户添加成功";

} else {

echo "错误: " . $sql . "<br>" . $conn->error;

}

}

// 显示所有用户

function showUsers() {

global $conn;

$sql = "SELECT * FROM users";

$result = $conn->query($sql);

if ($result->num_rows > 0) {

while($row = $result->fetch_assoc()) {

echo "用户名: " . $row["username"]. " - 角色: " . $row["role"]. "<br>";

}

} else {

echo "0 结果";

}

}

?>