reservation_admin/app/common/model/Announcement.php

<?php

namespace app\common\model;

use think\Model;

//公告表
class Announcement extends Model
{
    protected $updateTime = false;

    /**
     * 获取内容
     * @param $host bool/string 可指定域名,默认当前域名
     * @return mixed|string
     */
    public function getContent($host = true)
    {
        if (empty($this->content)) {
            return "";
        }
        $content = $this->content;
        $imgs = matchImg($this->content);
        foreach ($imgs as $image) {
            if (startWith($image, 'http')) {
                continue;
            }
            $full_image = url($image, '', false, $host);//加上域名
            $content = str_replace($image, $full_image, $content);
        }
        return $content;
    }

    /**
     * 获取缩略图
     * @param $host bool/string 可指定域名,默认当前域名
     * @return bool|mixed|string
     */
    public function getThumb($host = true)
    {
        if ($this->thumb) {
            $thumb_url = geturl($this->thumb);
            if (startWith($thumb_url, 'http')) {
                return $thumb_url;
            } else {
                return url($thumb_url, '', false, $host);
            }
        } else {
            //尝试从内容中提取图片
            if (empty($this->content)) {
                return "";
            }
            $imgs = matchImg($this->content);
            return count($imgs) == 0 ? "" : $imgs[0];
        }
    }
}