116 lines
3.0 KiB
PHP
116 lines
3.0 KiB
PHP
<?php
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/**
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* 数据库连接类
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* 提供 MySQL 数据库连接和基础查询功能
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*/
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class Database {
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private static $instance = null;
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private $connection;
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private $config;
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private function __construct() {
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$configFile = __DIR__ . '/../config/config.php';
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if (!file_exists($configFile)) {
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throw new Exception('配置文件不存在: ' . $configFile);
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}
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$this->config = include $configFile;
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$dbConfig = $this->config['database'];
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try {
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$dsn = "mysql:host={$dbConfig['host']};port={$dbConfig['port']};dbname={$dbConfig['dbname']};charset={$dbConfig['charset']}";
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$this->connection = new PDO($dsn, $dbConfig['username'], $dbConfig['password']);
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$this->connection->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
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$this->connection->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_ASSOC);
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} catch (PDOException $e) {
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// 数据库连接失败时记录日志但不阻止页面加载
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error_log('[FutureOSS WebUI] 数据库连接失败: ' . $e->getMessage());
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$this->connection = null;
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}
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}
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/**
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* 获取单例实例
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*/
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public static function getInstance() {
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if (self::$instance === null) {
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self::$instance = new self();
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}
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return self::$instance;
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}
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/**
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* 获取数据库连接
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*/
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public function getConnection() {
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return $this->connection;
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}
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/**
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* 检查数据库是否可用
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*/
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public function isConnected() {
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return $this->connection !== null;
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}
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/**
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* 执行查询
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*/
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public function query($sql, $params = []) {
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if (!$this->isConnected()) {
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return false;
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}
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try {
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$stmt = $this->connection->prepare($sql);
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$stmt->execute($params);
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return $stmt;
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} catch (PDOException $e) {
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error_log('[FutureOSS WebUI] 数据库查询错误: ' . $e->getMessage());
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return false;
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}
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}
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/**
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* 获取所有结果
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*/
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public function fetchAll($sql, $params = []) {
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$stmt = $this->query($sql, $params);
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return $stmt ? $stmt->fetchAll() : [];
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}
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/**
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* 获取单条结果
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*/
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public function fetchOne($sql, $params = []) {
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$stmt = $this->query($sql, $params);
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return $stmt ? $stmt->fetch() : null;
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}
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/**
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* 插入数据并返回 ID
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*/
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public function insert($sql, $params = []) {
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$stmt = $this->query($sql, $params);
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return $stmt ? $this->connection->lastInsertId() : false;
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}
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/**
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* 防止 SQL 注入
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*/
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public function escape($value) {
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if (!$this->isConnected()) {
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return addslashes($value);
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}
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return $this->connection->quote($value);
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}
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// 防止克隆
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private function __clone() {}
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public function __wakeup() {
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throw new Exception("Cannot unserialize singleton");
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}
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}
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