Question

如何通过列解析html表td而不是按行解析（使用DOMDocument / DOMXPath）？意思是根据它所在的表的列来解析td元素，而不是它在哪个tr中？

Answer 1

HTML表按行而不是列分组。最好的办法是迭代行并将行分配给适当的数组，并按键同步。

示例：

<?php

$html = <<<HTML
<table id="target">
    <tr>
        <td>Col1</td>
        <td>Col2</td>
        <td>Col3</td>
    </tr>
    <tr>
        <td>Col1</td>
        <td>Col2</td>
        <td>Col3</td>
    </tr>
    <tr>
        <td>Col1</td>
        <td>Col2</td>
        <td>Col3</td>
    </tr>
    <tr>
        <td>Col1</td>
        <td>Col2</td>
        <td>Col3</td>
    </tr>
</table>
HTML;

$document = new DOMDocument();
$document->loadHTML($html);

$table = $document->getElementById("target");
$tr_list = $table->getElementsByTagName("tr");

$tr_count = 0;
$columns = array();
foreach ($tr_list as $tr) {
    /** @var $tr DOMElement */
    $td_list = $tr->getElementsByTagName("td");
    $tr_count++;
    $td_count = 0;
    foreach ($td_list as $td) {
        $columns[$tr_count][$td_count] = $td;
        $td_count++;
    }

}

print_r($columns);

按列NOT行解析HTML表

1 个答案: