笔者经常去本地的淄博图书馆借阅图书，该图书馆的藏书并不是很丰富，并不是大部分的书都能找到，一般都是有啥书就翻翻是不是合适再借阅，之前就想如果能在检索的时候显示豆瓣的评分，优先选择评价好的经典图书会比较好，图书馆官网并没有这样的功能，于是就有了下面的代码。

该代码基于thinkphp5+php7下运行，采用querylist采集组件，确实强大方便，并利用组件自带的从LARAVEL抽离的集合扩展tightenco/collect进行按评分的倒序显示.

<?php
namespace app\index\controller;

use app\common\controller\Common;
use QL\QueryList;

class Book extends Common{

    public function index()
    {
        set_time_limit(0);
         $apikey = "0df993c66c0c636e29ecbb5344252a4a";
         $doubanurl = "https://api.douban.com/v2/book/isbn/";
        if(input('?keyword'))
        {
            $keyword = input('keyword');
            $url = "http://222.134.129.122:458/opac/search?searchWay=title&q=" . $keyword  . "&view=&searchSource=reader&booktype=&scWay=dim&marcformat=&sortWay=score&sortOrder=desc&startPubdate=&endPubdate=&rows=100&hasholding=1&curlocal=";
            //获取并按采集规则返回数据
            $rules = [
               'title' => ['.title-link','text','span'],
               'isbn'  => ['.bookcover_img','isbn'],
               'num'   => ['.bookmeta>div>span:eq(1)','text'],
                'callno' => ['.callnosSpan','text'],
               // 'holding' => ['.expressServiceTab>ul>li:eq(0)>a','text']
            ];
            //切片选择器
            $range = '.resultTable>tr';
            //echo $url;die();
            $ql = QueryList::get($url)->rules($rules)->range($range)->query();
            //匿名回调处理豆瓣信息
            $data = $ql->getData(function ($item) use ($apikey,$doubanurl) {
                $douban = QueryList::get($doubanurl . $item['isbn'] . '?apikey=' . $apikey)->getHtml();
                $doubanObj = json_decode($douban);
                if($doubanObj){
                    $item['rating'] = $doubanObj->rating->average;
                    $item['author'] = $doubanObj->author;
                    $item['pubdate'] = $doubanObj->pubdate;
                    $item['image'] = $doubanObj->image;
                    $item['publisher'] = $doubanObj->publisher;
                    $item['doubanurl'] = $doubanObj->alt;
                }
                sleep(5);
                return $item;
            });
            //dump($data->all());
            $sorted = $data->sortByDesc('rating');
            return json($sorted->all());
        }
        else
        {
            $this->error("请输入关键词");
        }

    }
}

细节调整、容错版

<?php
namespace app\index\controller;

use app\common\controller\Common;
use QL\QueryList;
use GuzzleHttp\Exception\RequestException;

class Book extends Common{

    public function index()
    {
        set_time_limit(0);
         $apikey = "0df993c66c0c636e29ecbb5344252a4a";
         $doubanurl = "https://api.douban.com/v2/book/isbn/";
        if(input('?keyword'))
        {
            $keyword = input('keyword');
            $url = "http://222.134.129.122:458/opac/search?searchWay=title&q=" . $keyword  . "&view=&searchSource=reader&booktype=&scWay=dim&marcformat=&sortWay=score&sortOrder=desc&startPubdate=&endPubdate=&rows=100&hasholding=1&curlocal=";
            //获取并按采集规则返回数据
            $rules = [
               'title' => ['.title-link','text','span'],
               'isbn'  => ['.bookcover_img','isbn'],
               'num'   => ['.bookmeta>div>span:eq(1)','text'],
                'callno' => ['.callnosSpan','text'],
               // 'holding' => ['.expressServiceTab>ul>li:eq(0)>a','text']
            ];
            //切片选择器
            $range = '.resultTable>tr';
            //echo $url;die();

            //忽略错误
            $ql1 = QueryList::getInstance();
            //注册一个myGet方法到QueryList对象
            $ql1->bind('myGet',function ($url,$args = null,$otherArgs = []){
                try{
                    $this->get($url,$args,$otherArgs);
                }catch(RequestException $e){
                    $this->setHtml('');
                    // print_r($e->getRequest());
                    echo "Http Error \r\n";
                }
                return $this;
            });

            $ql = QueryList::get($url)->rules($rules)->range($range)->query();
            //匿名回调处理豆瓣信息

            $data = $ql->getData(function ($item) use ($apikey,$doubanurl,$ql1) {

                //初始数据
                $item['image'] = "http://222.134.129.122:458/opac/media/images/book-default-small.gif";
                $item['rating'] = '0';
                $item['author'] = '';
                $item['pubdate'] = '';
                $item['image'] = '';
                $item['publisher'] = '';
                $item['doubanurl'] = '';
                //有isbn
                if($item['isbn']) {
                    try {
                        //忽略信息
                        $douban = $ql1->myGet($doubanurl . $item['isbn'] . '?apikey=' . $apikey)->getHtml();
                        $doubanObj = json_decode($douban);
                        if ($doubanObj && !isset($doubanObj->msg)) {
                            $item['rating'] = $doubanObj->rating->average;
                            $item['author'] = $doubanObj->author;
                            $item['pubdate'] = $doubanObj->pubdate;
                            $item['image'] = $doubanObj->image;
                            $item['publisher'] = $doubanObj->publisher;
                            $item['doubanurl'] = $doubanObj->alt;
                        }

                    }
                    catch (RequestException $e){
                        //echo 'Http Error';
                    }
                }
                sleep(5);
                return $item;
            });
            //dump($data->all());
            $sorted = $data->sortByDesc('rating');
            //return json($sorted->all());
            $this->assign('keyword',$keyword);
            $this->assign('books',$sorted->all());
            return $this->fetch(); // 渲染模板
        }
        else
        {
            $this->assign('books',[]);
            $this->assign('keyword','');
            return $this->fetch(); // 渲染模板
        }

    }
}