add

app/admin/model/SysCaptcha.php

@@ -0,0 +1,21 @@
+<?php
+
+namespace app\admin\model;
+
+use think\Model;
+use think\captcha\facade\Captcha as thinkCaptcha;
+
+class SysCaptcha extends Model
+{
+    public static function getCode($uuid)
+    {
+        $code_data = thinkCaptcha::create('czg');
+        // 保存至数据库
+        self::create([
+            'uuid' => $uuid,
+            'code' => $code_data['code'],
+            'expire_time' => date('Y-m-d H:i:s', time() + config('captcha.expire_time')),
+        ]);
+        return ['img' => $code_data['img']];
+    }
+}