twong329/app/models/system/DictCoin.php

<?php
namespace app\models\system;

use crmeb\traits\ModelTrait;
use crmeb\basic\BaseModel;
use think\facade\Cache;

class DictCoin extends BaseModel {

    use ModelTrait;

    public static function getIcon($symbol) {
        $icon = Cache::get('icon_' . $symbol);
        if ($icon) {
            return $icon;
        }
        $icon = self::where('symbol', $symbol)->value('icon');
        Cache::set('icon_' . $symbol, $icon, 86400);
        return $icon;
    }
}