Using QueryList in ThinkPHP6

With the continuous development of Internet technology, data crawlers have become one of the important ways for people to obtain information. In the PHP framework, ThinkPHP6 not only provides powerful data manipulation functions, but also provides us with a data grabbing library called QueryList to help us obtain data more conveniently.

QueryList is a PHP data collection and processing library based on streaming chain operations. It can extract data from various types of text such as HTML, XML, JSON, and TXT. This article will mainly introduce how to use QueryList to capture and process data in ThinkPHP6.

1. Install QueryList

First, we need to install QueryList in our ThinkPHP6 application. You can use Composer to install through the following command:

composer require jaeger/querylist

After the installation is completed, we need to create a querylist.php configuration file in the application's config directory with the following content:

<?php

return [
    'default' => [
        'type' => 'php',
        'host' => '',
        'login' => '',
        'password' => '',
        'database' => '',
        'prefix' => '',
        'charset' => 'utf8',
        'deploy' => 0,
        'rw_separate' => false,
        'master_num' => 1,
        'slave_no' => '',
        'fields_fix'=>"fl_",
        'debug' => true,
        'logfile' => 'QueryList.log',
    ],
];

This configuration file It is the default configuration of QueryList. The meaning and usage of each parameter in the configuration file can be viewed in the official documentation of QueryList.

2. Use QueryList for data capture

QueryList provides a series of chain operation methods to help us obtain and process data. These methods include search, filtering, extraction and conversion, etc. A series of common data operations.

The following is a simple example. We will use QueryList to grab the data of Baidu homepage and output the title and link.

use QLQueryList;

$html = file_get_contents('https://www.baidu.com');
$rules = [
    'title' => ['title', 'text'],
    'link' => ['a', 'href']
];
$data = QueryList::html($html)->rules($rules)->query()->getData();
print_r($data->all());

In the above code snippet, we first use PHP's own file_get_contents function to obtain the source code of Baidu's homepage, and then define a rule array $rules to represent the type and location of the data we need to capture. In this example, we need to extract all titles and links in the web page.

After defining the rules, we convert the HTML text into a query object, apply the rules to the query object, and finally obtain the data through the getData method. Use the print_r method to output all the data obtained. We can see that the output results are as follows:

Array
(
    [0] => Array
        (
            [title] => 百度一下，你就知道
            [link] => https://www.baidu.com/s?tn=site888_2_pg&ch=12&usm=0&rsv_pq=c41e6776001f4675&rsv_t=18fbRjBF2q5prQVFnv46BpnHtLGviB4KLud38LaBjYeT%2BRvj1zHqh7ksOBo&rqlang=cn&rsv_dl=0&rs=1&inputT=2696&rsv_sug3=15&rsv_sug1=12&rsv_sug7=100&sug=0&prefixsug=0&rsp=0&inputT=2890&rsv_sug4=3114
        )

    [1] => Array
        (
            [title] => 新闻
            [link] => https://www.baidu.com/s?cl=2&tn=site888_2_pg&ch=11&usm=0&rsv_pq=c41e6776001f4675&rsv_t=18fbRjBF2q5prQVFnv46BpnHtLGviB4KLud38LaBjYeT%2BRvj1zHqh7ksOBo&rqlang=cn&rsv_dl=0&rs=1&inputT=2696&rsv_sug3=19&rsv_sug1=17&rsv_sug7=101&sug=0&prefixsug=news&rsp=0&inputT=2890&rsv_sug4=4085
        )

    [2] => Array
        (
            [title] => hao123_上网从这里开始
            [link] => https://www.baidu.com/s?cl=3&tn=site888_2_pg&ch=6&usm=0&rsv_pq=c41e6776001f4675&rsv_t=18fbRjBF2q5prQVFnv46BpnHtLGviB4KLud38LaBjYeT%2BRvj1zHqh7ksOBo&rqlang=cn&rsv_dl=0&rs=1&inputT=2696&rsv_sug3=25&rsv_sug1=23&rsv_sug7=100&sug=0&prefixsug=hao123&rsp=0&inputT=2890&rsv_sug4=5329
        )

    [3] => Array
        (
            [title] => 地图
            [link] => https://www.baidu.com/s?cl=4&tn=site888_2_pg&ch=1&usm=0&rsv_pq=c41e6776001f4675&rsv_t=18fbRjBF2q5prQVFnv46BpnHtLGviB4KLud38LaBjYeT%2BRvj1zHqh7ksOBo&rqlang=cn&rsv_dl=0&rs=1&inputT=2696&rsv_sug3=31&rsv_sug1=28&rsv_sug7=100&sug=0&prefixsug=map&rsp=0&inputT=2890&rsv_sug4=6166
        )

    [4] => Array
        (
            [title] => 视频
            [link] => https://www.baidu.com/s?cl=5&tn=site888_2_pg&ch=8&usm=0&rsv_pq=c41e6776001f4675&rsv_t=18fbRjBF2q5prQVFnv46BpnHtLGviB4KLud38LaBjYeT%2BRvj1zHqh7ksOBo&rqlang=cn&rsv_dl=0&rs=1&inputT=2696&rsv_sug3=37&rsv_sug1=34&rsv_sug7=100&sug=0&prefixsug=video&rsp=0&inputT=2890&rsv_sug4=7407
        )

    [5] => Array
        (
            [title] => 贴吧
            [link] => https://www.baidu.com/s?cl=6&tn=site888_2_pg&ch=7&usm=0&rsv_pq=c41e6776001f4675&rsv_t=18fbRjBF2q5prQVFnv46BpnHtLGviB4KLud38LaBjYeT%2BRvj1zHqh7ksOBo&rqlang=cn&rsv_dl=0&rs=1&inputT=2696&rsv_sug3=43&rsv_sug1=39&rsv_sug7=100&sug=0&prefixsug=tf&rsp=0&inputT=2890&rsv_sug4=8649
        )

    [6] => Array
        (
            [title] => 学术
            [link] => https://www.baidu.com/s?cl=7&tn=site888_2_pg&ch=9&usm=0&rsv_pq=c41e6776001f4675&rsv_t=18fbRjBF2q5prQVFnv46BpnHtLGviB4KLud38LaBjYeT%2BRvj1zHqh7ksOBo&rqlang=cn&rsv_dl=0&rs=1&inputT=2696&rsv_sug3=49&rsv_sug1=45&rsv_sug7=100&sug=0&prefixsug=xueshu&rsp=0&inputT=2890&rsv_sug4=9890
        )

    [7] => Array
        (
            [title] => 登录
            [link] => https://passport.baidu.com/v3/?reg&redirect=http%3A%2F%2Fwww.baidu.com%2F&tpl=mn&u=http%3A%2F%2Fwww.baidu.com%2F
        )

)

As you can see, we have successfully extracted the title and link from the page. Through simple chain operations, we can complete data capture and processing.

3. Use QueryList for data storage

After data capture and processing, we may need to store the obtained data in the database for subsequent use. QueryList provides a convenient method to store data into the database. The following is a simple example where we store data into a MySQL database.

use QLQueryList;

$rules = [
    'title' => ['title', 'text'],
    'link' => ['a', 'href']
];
$data = QueryList::get('https://www.baidu.com')->rules($rules)->query()->getData();
$db = new     hinkDb;
$affected = $db::table('test')->insertAll($data->all());
echo '添加成功' . $affected . '条数据';

First, we defined the previous rule array and the method to obtain data. In this example, we use the get method of QueryList to obtain the data of the page. After obtaining the data, we first instantiate a database operation class, and then use the insertAll method to batch insert data into the database.

After executing the above code, we can see the newly inserted data in the MySQL database.

In summary, using QueryList in ThinkPHP6 can easily complete data capture and processing, and it can also easily store the captured data in the database. QueryList's chain operation method is also very suitable for data processing and conversion.

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