初始化仓库及v1.0.0提交

app/Config/AppConfig.php

@@ -0,0 +1,57 @@
+<?php
+
+namespace App\Config;
+
+class AppConfig
+{
+    private static ?array $cache = null;
+    private static string $configPath = '';
+
+    private static function getConfigPath(): string
+    {
+        if (self::$configPath === '') {
+            self::$configPath = dirname(__DIR__, 2) . '/config/app-config.json';
+        }
+
+        return self::$configPath;
+    }
+
+    private static function load(): array
+    {
+        if (self::$cache !== null) {
+            return self::$cache;
+        }
+
+        $path = self::getConfigPath();
+
+        if (!file_exists($path)) {
+            self::$cache = [];
+            return self::$cache;
+        }
+
+        $content = file_get_contents($path);
+        self::$cache = json_decode($content, true) ?? [];
+
+        return self::$cache;
+    }
+
+    public static function get(string $key, $default = null)
+    {
+        $config = self::load();
+        return $config[$key] ?? $default;
+    }
+
+    public static function set(string $key, $value): void
+    {
+        $config = self::load();
+        $config[$key] = $value;
+        self::$cache = $config;
+
+        $dir = dirname(self::getConfigPath());
+        if (!is_dir($dir)) {
+            mkdir($dir, 0755, true);
+        }
+
+        file_put_contents(self::getConfigPath(), json_encode($config, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE));
+    }
+}

app/Config/Database.php

@@ -0,0 +1,39 @@
+<?php
+
+namespace App\Config;
+
+use PDO;
+use PDOException;
+
+class Database
+{
+    private static ?PDO $instance = null;
+
+    private function __construct()
+    {
+        $configPath = dirname(__DIR__, 2) . '/config/db-config.json';
+
+        if (!file_exists($configPath)) {
+            throw new PDOException('数据库配置文件不存在');
+        }
+
+        $config = json_decode(file_get_contents($configPath), true);
+
+        $dsn = "mysql:host={$config['host']};port={$config['port']};dbname={$config['dbname']};charset=utf8mb4";
+
+        self::$instance = new PDO($dsn, $config['user'], $config['password'], [
+            PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
+            PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
+            PDO::MYSQL_ATTR_INIT_COMMAND => "SET NAMES utf8mb4",
+        ]);
+    }
+
+    public static function getInstance(): PDO
+    {
+        if (self::$instance === null) {
+            new self();
+        }
+
+        return self::$instance;
+    }
+}