第一个元素没有数字并且数字不会在新类别中重置

First element does not have number and the number does not reset in new category

我试图抓取此页面: http://hea.uum.edu.my/index.php/academic/current-student/convocation

这是我的代码

<?php
require_once 'vendor/autoload.php';

use Goutte\Client;

$client = new Client();
$crawler = $client->request('GET', 'http://hea.uum.edu.my/index.php/academic/current-student/convocation');


$step = array();
$i = 0;
$crawler->filter('.sppb-addon.sppb-addon-accordion')->each(function ($node) {
    global $step, $i;
    $step[$i]['item'] = array();

    $node->filter('.sppb-addon-title')->each(function ($node) {
        global $step, $i;
        $step[$i]['cat'] = $node->html();
    });

    $j = 0;
    $node->filter('.sppb-panel-heading > .sppb-panel-title')->each(function ($node) {
        global $step, $i, $j;
        $step[$i]['item'][$j++]['title'] = $node->html();
    });

    $h = 0;
    $node->filter('.sppb-panel-body .sppb-addon-content')->each(function ($node) {
        global $step, $i, $h;
        $step[$i]['item'][$h++]['content'] = $node->html();
    });

    $i++;

});

print_r($step);

除了 item 的第一个元素没有数字并且在新数组中编号不会重置之外,它几乎是完美的。

    Array
    (
        [0] => Array
            (
                [item] => Array
                    (
                        [] => Array //here no number
                            (
                                [title] => STEP 1 :  ...
                                [content] => <p>If you are eligible to graduate...

...
    [1] => Array
        (
            [item] => Array
                (
                    [13] => Array //here the number should be 0
                        (
                            [title] => STEP 14 : CONVOCATION DRESS ..
                            [content] => <p>Here are the official...

你可以在这里看到结果:view-source:http://convo18.uum.my/

请帮忙。我很想知道除了解决我的问题之外,您是否有任何优雅的解决方案。

感谢您的宝贵时间。

============================================= ============================

更新:感谢@NigelRen 的建议,这是有效的代码:

<?php
require_once 'vendor/autoload.php';

use Goutte\Client;

$client = new Client();
$crawler = $client->request('GET', 'http://hea.uum.edu.my/index.php/academic/current-student/convocation');


$step = array();
$i = 0;

$crawler->filter('.sppb-addon.sppb-addon-accordion')->each(function ($node) use (&$step, &$i) {

    $step[$i]['item'] = array();

    $node->filter('.sppb-addon-title')->each(function ($node) use (&$step, &$i) {

        $step[$i]['cat'] = $node->html();
    });


    $h = 0;
    $node->filter('.sppb-panel-heading > .sppb-panel-title')->each(function ($node) use (&$step, &$i, &$h) {

        $step[$i]['item'][$h++]['title'] = $node->html();
    });

    $h = 0;
    $node->filter('.sppb-panel-body .sppb-addon-content')->each(function ($node) use (&$step, &$i, &$h)  {

        $step[$i]['item'][$h++]['content'] = $node->html();
    });

    $i++;

});

print_r($step);

刚刚测试了一个虚拟设置,我认为解决方案是在任何嵌套函数之外定义 $j$h。原因是它们没有在全局范围内定义,所以当您说 global $step, $i, $j; 然后 $j++ 时,这将在第一次将其视为未定义,然后 post 增量将其设置为1. 显示这个的测试代码是...

$a = function() {
    global $c;
    echo "Value=";
    echo $c++;
    echo PHP_EOL;
};

$a();
$a();

输出...

Value=
Value=1

而...

$c=0;
$a = function() {
    global $c;
    echo "Value=";
    echo $c++;
    echo PHP_EOL;
};

$a();
$a();

给出所需的输出...

Value=0
Value=1

所以在开始时定义所有这些...

$i = 0;
$j = 0;
$h = 0;

编辑: 虽然根据我最初的评论,global 通常不受欢迎,但它使测试更加困难,而且(如发现的那样)可能无法按您预期的那样工作。建议的方法是使用function(...) use(...) {方法格式,所以在例子中...

$c=0;
$a = function() use (&$c) {
    echo "Value=";
    echo $c++;
    echo PHP_EOL;
};

$a();
$a();