PHP ? SQLite? ??? ??? ?? ? ??? ??

?? ? ???????? ??? ?? ? ??? ??? ?? ??? ?????. ??? ?? ??? ?? ??? ???? ?? ???? ??? ???? ? ??? ? ? ????. ? ????? PHP ? SQLite? ???? ?? ??? ?? ? ??? ??? ???? ??? ?????.

?? ??? ? ?? ??? ?? ??? ???? ?? SQLite ??????? ???? ???. ??? ??? ??? ???? ?? ???? ?????.

CREATE TABLE users (
    id INTEGER PRIMARY KEY,
    username TEXT,
    password TEXT
);

CREATE TABLE permissions (
    id INTEGER PRIMARY KEY,
    name TEXT,
    description TEXT
);

CREATE TABLE user_permissions (
    user_id INTEGER,
    permission_id INTEGER,
    FOREIGN KEY (user_id) REFERENCES users(id),
    FOREIGN KEY (permission_id) REFERENCES permissions(id)
);

? ???? ? ?? ???? ??????. users ????? ID, ??? ??, ????? ??? ???? ?? ??? ?????. permissions ????? ?? ??? ?? ??? ?????. ? ???? ID, ?? ? ??? ????. user_permissions ???? ???? ?? ??? ???? ??? ??????. ???? user_id ?permission_id? ?? ?? ?????. users表存儲用戶的基本信息，包括id、username和password。permissions表存儲所有可用的權(quán)限，每個(gè)權(quán)限都有id、name和description。user_permissions表是一個(gè)關(guān)聯(lián)表，用于將用戶和他們的權(quán)限關(guān)聯(lián)起來。該表使用user_id和permission_id作為外鍵。

接下來，我們可以使用PHP代碼來實(shí)現(xiàn)用戶注冊、登錄和權(quán)限檢查的功能。以下是示例代碼的簡化版本：

<?php
class User {
    private $db;

    public function __construct() {
        $this->db = new SQLite3('path/to/database.db');
    }

    public function register($username, $password) {
        // 檢查用戶名是否已經(jīng)存在
        if ($this->getUserByUsername($username)) {
            return false;
        }

        // 生成密碼哈希
        $hashedPassword = password_hash($password, PASSWORD_DEFAULT);

        // 插入新用戶到數(shù)據(jù)庫
        $stmt = $this->db->prepare('INSERT INTO users (username, password) VALUES (:username, :password)');
        $stmt->bindParam(':username', $username);
        $stmt->bindParam(':password', $hashedPassword);
        $stmt->execute();

        return true;
    }

    public function login($username, $password) {
        // 獲取用戶信息
        $user = $this->getUserByUsername($username);

        // 驗(yàn)證密碼
        if ($user && password_verify($password, $user['password'])) {
            // 存儲用戶信息到會(huì)話
            $_SESSION['user'] = $user;
            return true;
        }

        return false;
    }

    public function isLoggedIn() {
        return isset($_SESSION['user']);
    }

    public function hasPermission($permission) {
        if (!$this->isLoggedIn()) {
            return false;
        }

        // 檢查用戶權(quán)限
        $stmt = $this->db->prepare('SELECT COUNT(*) FROM user_permissions WHERE user_id = :user_id AND permission_id = :permission_id');
        $stmt->bindParam(':user_id', $_SESSION['user']['id']);
        $stmt->bindParam(':permission_id', $permission);
        $result = $stmt->execute()->fetchArray();

        return $result[0] > 0;
    }

    private function getUserByUsername($username) {
        $stmt = $this->db->prepare('SELECT * FROM users WHERE username = :username');
        $stmt->bindParam(':username', $username);
        $result = $stmt->execute()->fetchArray();

        return $result ? $result : false;
    }
}
?>

以上代碼是一個(gè)簡單的User類，它提供了注冊、登錄和權(quán)限檢查的功能。在構(gòu)造函數(shù)中，我們連接到了SQLite數(shù)據(jù)庫。register方法用于用戶注冊，它檢查用戶名是否已經(jīng)存在，然后將新用戶插入到數(shù)據(jù)庫。login方法用于用戶登錄，它驗(yàn)證密碼并將用戶信息存儲在會(huì)話中。isLoggedIn方法檢查用戶是否已經(jīng)登錄，hasPermission

???? PHP ??? ???? ??? ??, ??? ? ?? ?? ??? ??? ? ????. ??? ?? ??? ???? ?????.

<?php
// 實(shí)例化User類
$user = new User();

// 用戶注冊
$user->register('alice', 'password');

// 用戶登錄
$user->login('alice', 'password');

// 檢查用戶權(quán)限
if ($user->hasPermission(1)) {
    echo 'User has permission!';
} else {
    echo 'Access denied!';
}
?>

? ??? ??, ??? ? ?? ?? ??? ???? ??? User ??????. ????? SQLite ??????? ?????. register ???? ??? ??? ?? ????? ??? ? ? ???? ??????? ???? ? ?????. login ???? ??? ???? ???? ????? ???? ??? ??? ??? ?????. isLoggedIn ???? ???? ?????? ????, hasPermission ???? ????? ?? ??? ??? ?????.

?? ?:

rrreee

? ???? ?? User ???? ????????. ?? ?? ? ???? ???? ?? ???? ???? ???????. ????? ????? ?? 1? ??? ???? ? ??? ?? ??? ???? ?????. ????PHP? SQLite? ???? ??? ?? ? ??? ?? ??? ?? ?? ??? ? ????. ? ?? ?? ?? ??? ???, ?? ?? ?? ? ?? ??? ???? ? ??? ?? ?? ?? ? ??? ??? ? ????. ? ??? ??? ??? ????! ??

? ??? PHP ? SQLite? ???? ??? ?? ? ??? ?? ??? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!