doutuoben6908
doutuoben6908
2013-08-13 20:55
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已采纳

在PHP中使用XPath和DOM获取表格单元格TD值

I need to access table cell values via DOM / PHP. The web page is loaded into $myHTML. I have identified the XPath as :

//*[@id="main-content-inner"]/div[2]/div[1]/div/div/table/tbody/tr/td[1]

I want to get the text of the value in the cell as follows:

$dom = new DOMDocument();
$dom->loadHTML($myHTML);    
$xpath = new DOMXPath($dom);    
$myValue = $xpath->query('//*[@id="main-content-inner"]/div[2]/div[1]/div/div/table/tbody/tr/td[1]');

echo $myValue->nodeValue;

But I am getting "Undefined Property: DOMNodeList::$nodeValue error. How do I retrieve the value of this table cell? I have tried various techniques from stackoverflow with no luck.

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1条回答 默认 最新

  • doujuyang1764
    doujuyang1764 2013-08-13 21:04
    已采纳

    DOMXPath::query() returns a DOMNodeList, even if there's only one match.

    If you know for sure you have a match there, you can use

    echo $myValue->item(0)->nodeValue;
    

    But if you want to be bullet proof, you better check the length in advance, e.g.

    if ($myValue->length > 0) {
        echo $myValue->item(0)->nodeValue;
    } else {
        //No such cell. What now?
    }
    
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