简单 html dom 解析器查找文本

Question

在我的案例中，页面有多个 table 具有相同的 class，所以我在 tr, td and plaintext.

的帮助下找到了价值

PHP部分：

$html = file_get_html('http://www.example.com/');
$eles = $html->find('.info-tab');
foreach($eles as $e) {
    if(strpos($e->find('tr',0)->plaintext, "Information about the manufacturer and the model." ) ) {
    $value1 = $e->find('td',1)->plaintext;
    }

    if(strpos($e->find('tr',1)->plaintext, "Information about the manufacturer and the model." ) ) {
    $value2 = $e->find('td',1)->plaintext;
    }
}
echo $value1;
echo $value2;

网页

// Here's will be many other "Table" with diffrent text but class & ID are same...

<table class="info-tab">
    <tbody>
        <tr>
            <td>Information about the manufacturer and the model.</td>
            <td>1000</td>
        </tr>
        <tr>
            <td>dummy text</td>
            <td>dummy text</td>
        </tr>
    </tbody>
</table>

// Here's will be many other "Table" with diffrent text but class & ID are same...

<table class="info-tab">
    <tbody>
        <tr>
            <td>dummy text</td>
            <td>dummy text</td>
        </tr>
        <tr>
            <td>Information about the manufacturer and the model.</td>
            <td>3000</td>
        </tr>
        <tr>
            <td>dummy text</td>
            <td>dummy text</td>
        </tr>
    </tbody>
</table>

// Here's will be many other "Table" with diffrent text but class & ID are same...

页面有多个table 20+，只有两个table有这个文字所以我想复制它们。

如何找到这两个值？

Answer 1

您应该迭代 tables 并且对于每个 table，迭代行：

$token = "Information about the manufacturer and the model.";
$tables = $html->find('.info-tab');
$values = [];
foreach ($tables as $table) {
    foreach ($table->find('tr') as $row) {
        if (strpos($row->find('td', 0)->plaintext, $token) !== false) {
            $values [] = $row->find('td', 1)->plaintext;
        }
    }
}
var_dump($values);

您的代码不起作用，因为 $e->find('td', 1) 始终是 table 中第一行的第二个 td（并且它不考虑选定的第 0 行或第 1 行）。

简单 html dom 解析器查找文本

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