如何迭代DomCrawler结果并搜索特定元素

问题描述

考虑一个类别为day的具有多个div的网页。感谢DOMCrawler，我列出了这些div：

$crawler = new Crawler($html);
$days = $crawler->filter('.day');

那些day的div包含一个数组，我需要遍历每一行，然后遍历每个单元格。从理论上讲，我想执行以下操作：

foreach($days as $day) {
    $rows = $day->filter('tr');
    foreach($rows as $row) {
        $cells = $row->filter('td');
        foreach($cells as $cell) {
            echo ($cell->textContent);
        }
    }
}

但是我找不到正确的方法。

解决方法

如果您不需要这些嵌套循环：

$crawler = new Crawler($html);
$cells = $crawler->filter('.day td');
$cells->each(function (Crawler $cell) {
    dump($cell->text());
});
    

具有如示例中所示的嵌套循环

$crawler = new Crawler($html);
$days = $crawler->filter('.day');
$days->each(function (Crawler $day) {
    $rows = $day->filter('tr');
    $rows->each(function (Crawler $row) {
        $cells = $row->filter('td');
        $cells->each(function (Crawler $cell) {
            dump($cell->text());
        });
    });
});