init

includes/db.php

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+<?php
+// 数据库连接和初始化
+
+$db_path = __DIR__ . '/../data/database.db';
+$is_new_db = !file_exists($db_path);
+
+try {
+    $db = new PDO('sqlite:' . $db_path);
+    $db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
+
+    // 如果是新数据库，初始化表结构
+    if ($is_new_db) {
+        // 创建 apps 表
+        $db->exec("
+            CREATE TABLE IF NOT EXISTS apps (
+                id INTEGER PRIMARY KEY AUTOINCREMENT,
+                filename TEXT NOT NULL,
+                original_name TEXT NOT NULL,
+                version TEXT,
+                description TEXT,
+                upload_time DATETIME DEFAULT CURRENT_TIMESTAMP,
+                file_size INTEGER
+            )
+        ");
+
+        // 创建 config 表
+        $db->exec("
+            CREATE TABLE IF NOT EXISTS config (
+                key TEXT PRIMARY KEY,
+                value TEXT
+            )
+        ");
+
+        // 插入默认配置
+        $defaults = [
+            ['site_title', 'OPS 运营管理系统'],
+            ['site_description', '点击下方按钮下载移动端 APP'],
+            ['logo_path', 'logo.png']
+        ];
+
+        $stmt = $db->prepare("INSERT INTO config (key, value) VALUES (?, ?)");
+        foreach ($defaults as $config) {
+            $stmt->execute($config);
+        }
+    }
+
+} catch (PDOException $e) {
+    die("数据库连接失败: " . $e->getMessage());
+}

includes/functions.php

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+<?php
+// 通用函数
+
+/**
+ * 获取配置值
+ */
+function getConfig($key, $default = '') {
+    global $db;
+    $stmt = $db->prepare("SELECT value FROM config WHERE key = ?");
+    $stmt->execute([$key]);
+    $result = $stmt->fetch(PDO::FETCH_ASSOC);
+    return $result ? $result['value'] : $default;
+}
+
+/**
+ * 更新配置值
+ */
+function updateConfig($key, $value) {
+    global $db;
+    $stmt = $db->prepare("INSERT OR REPLACE INTO config (key, value) VALUES (?, ?)");
+    return $stmt->execute([$key, $value]);
+}
+
+/**
+ * 格式化文件大小
+ */
+function formatFileSize($bytes) {
+    if ($bytes >= 1073741824) {
+        return number_format($bytes / 1073741824, 2) . ' GB';
+    } elseif ($bytes >= 1048576) {
+        return number_format($bytes / 1048576, 2) . ' MB';
+    } elseif ($bytes >= 1024) {
+        return number_format($bytes / 1024, 2) . ' KB';
+    } else {
+        return $bytes . ' B';
+    }
+}
+
+/**
+ * 检查是否已登录
+ */
+function isLoggedIn() {
+    return isset($_SESSION['admin_logged_in']) && $_SESSION['admin_logged_in'] === true;
+}
+
+/**
+ * 安全输出 HTML
+ */
+function e($string) {
+    return htmlspecialchars($string, ENT_QUOTES, 'UTF-8');
+}