getData() Get the collection results

getData( ) method

Return value: array

Get the result of collecting the result data data and can further process the results.

Prototype:

getData($callback = null)

Parameters: $callback

Type:callback
Default value:null

You can use this callback function to further process the results, replace content, complete links, and download Pictures, etc.;
And you can also use QueyList in this callback function to perform nested infinite collection.

Usage

Collect all picture links, collection target:

$html =<<<STR
    <div class="xx">
        <img data-src="/path/to/1.jpg" alt="">
    </div>
    <div class="xx">
        <img data-src="/path/to/2.jpg" alt="">
    </div>
    <div class="xx">
        <img data-src="/path/to/3.jpg" alt="">
    </div>
STR;

$data = QueryList::Query($html,array(
        'image' => array('.xx>img','data-src')
    ))->getData(function($item){
        return $item;
    });
print_r($data);
/**
采集结果:
Array
(
    [0] => Array
        (
            [image] => /path/to/1.jpg
        )
    [1] => Array
        (
            [image] => /path/to/2.jpg
        )
    [2] => Array
        (
            [image] => /path/to/3.jpg
        )
)
**/

Add Requirements

The output array becomes a one-dimensional array, and the acquisition code is modified:

$data = QueryList::Query($html,array(
        'image' => array('.xx>img','data-src')
    ))->getData(function($item){
        return $item['image'];
    });
print_r($data);
/**
采集结果:
Array
(
    [0] => /path/to/1.jpg
    [1] => /path/to/2.jpg
    [2] => /path/to/3.jpg
)
**/

Continue to add Requirements

Complete the picture link and modify the collection code:

$baseUrl = 'http://xxxx.com';
$data = QueryList::Query($html,array(
        'image' => array('.xx>img','data-src')
    ))->getData(function($item) use($baseUrl){
        return $baseUrl.$item['image'];
    });
print_r($data);
/**
采集结果:
Array
(
    [0] => http://xxxx.com/path/to/1.jpg
    [1] => http://xxxx.com/path/to/2.jpg
    [2] => http://xxxx.com/path/to/3.jpg
)
**/

完整代码
<?php
require 'vendor/autoload.php';
use QL\QueryList;
$html =<<<STR
    <div class="xx">
        <img data-src="/path/to/1.jpg" alt="">
    </div>
    <div class="xx">
        <img data-src="/path/to/2.jpg" alt="">
    </div>
    <div class="xx">
        <img data-src="/path/to/3.jpg" alt="">
    </div>
STR;
$baseUrl = 'http://xxxx.com';
$data = QueryList::Query($html,array(
        'image' => array('.xx>img','data-src')
    ))->getData(function($item) use($baseUrl){
        return $baseUrl.$item['image'];
    });
print_r($data);