初始化

app/Models/Setting.php

@@ -0,0 +1,33 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+class Setting extends Model
+{
+    protected $fillable = ['key', 'value', 'group'];
+
+    /**
+     * 读取设置值，未设置时返回默认值。
+     */
+    public static function get(string $key, ?string $default = null): ?string
+    {
+        $row = static::where('key', $key)->first();
+        if (!$row) {
+            return $default;
+        }
+        return $row->value;
+    }
+
+    /**
+     * 写入或更新设置值。
+     */
+    public static function set(string $key, ?string $value, string $group = 'general'): void
+    {
+        static::updateOrCreate(
+            ['key' => $key],
+            ['value' => $value, 'group' => $group]
+        );
+    }
+}