搭建校園失物管理系統PHP原始碼教程

<?php
$host = 'localhost';
$dbname = 'your_database_name';
$username = 'your_username';
$password = 'your_password';

try {
    $pdo = new PDO("mysql:host=$host;dbname=$dbname", $username, $password);
    $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    echo "数据库连接成功";
} catch (PDOException $e) {
    echo "数据库连接失败: " . $e->getMessage();
}
?>

// 用户注册
<?php
if(isset($_POST['register'])) {
    $username = $_POST['username'];
    $password = password_hash($_POST['password'], PASSWORD_DEFAULT);
    
    // 将用户名和密码插入用户表中
    $stmt = $pdo->prepare("INSERT INTO users (username, password, role) VALUES (:username, :password, 'student')");
    $stmt->bindParam(':username', $username);
    $stmt->bindParam(':password', $password);
    
    if($stmt->execute()) {
        echo "注册成功";
    } else {
        echo "注册失败";
    }
}
?>

// 用户登录
<?php
if(isset($_POST['login'])) {
    $username = $_POST['username'];
    $password = $_POST['password'];
    
    $stmt = $pdo->prepare("SELECT * FROM users WHERE username = :username");
    $stmt->bindParam(':username', $username);
    $stmt->execute();
    $user = $stmt->fetch();
    
    if($user && password_verify($password, $user['password'])) {
        echo "登录成功";
    } else {
        echo "用户名或密码错误";
    }
}
?>

// 失物发布
<?php
if(isset($_POST['submit_lost_item'])) {
    $item_name = $_POST['item_name'];
    $description = $_POST['description'];
    
    // 将失物信息插入失物信息表中
    $stmt = $pdo->prepare("INSERT INTO lost_items (item_name, description, user_id) VALUES (:item_name, :description, :user_id)");
    $stmt->bindParam(':item_name', $item_name);
    $stmt->bindParam(':description', $description);
    $stmt->bindParam(':user_id', $_SESSION['user_id']);
    
    if($stmt->execute()) {
        echo "失物发布成功";
    } else {
        echo "失物发布失败";
    }
}
?>

// 失物查询
<?php
$stmt = $pdo->prepare("SELECT * FROM lost_items WHERE user_id = :user_id");
$stmt->bindParam(':user_id', $_SESSION['user_id']);
$stmt->execute();
$lost_items = $stmt->fetchAll();

foreach($lost_items as $item) {
    echo $item['item_name'] . ": " . $item['description'] . "<br>";
}
?>