yuan/application/common/model/ServiiceModel.php

<?php

namespace app\common\model;

use think\Cache;
use think\Model;

/**
 * 在线客服模型
 */
class ServiiceModel extends Model
{
    protected $name = 'service';

    public function getContentAttr($value)
    {
        return str_replace('src="','src="'.config('site.httpurl'),$value);
    }
}