如何使用 php DOMDocument 從子節點獲取文本

Question

我一直在編寫 php 代碼來從站點獲取信息，到目前為止我能夠獲取 href 屬性，但是我找不到從子節點“span”獲取文本的方法，有人可以幫助我嗎？

html->

<a class="js-publication" href="publication/247931167"> 
    <span class="publication-title">An approach for textual authoring</span> 
</a>

這就是我目前能夠獲得 href ->

    @$dom->loadHTMLFile($curPage);
    $anchors = $dom->getElementsByTagName('a'); 
    foreach ($anchors as $element) {            
        $class_ = $element->getAttribute('class');
        if (0 !== strpos($class_, 'js-publication')) {
            $href = $element->getAttribute('href');
            if(0 === stripos($href,'publication/')){
                echo $href;//link para a publicação;
                echo "\n";
            }
        }
    }

Answer 1

您可以使用DOMXpath

$html = <<< LOL
<a class="js-publication" href="publication/247931167"> 
    <span class="publication-title">An approach for textual authoring</span> 
</a>
LOL;

$dom = new DOMDocument();
$dom->loadHTML($html);
$xpath = new DOMXpath($dom);
foreach ($xpath->query("//a[@class='js-publication']") as $element){
    echo $element->getAttribute('href');
    echo $element->textContent;
}
//publication/247931167
//An approach for textual authoring

或者沒有for循環，如果你只想要一個元素：

echo $xpath->query("//a[@class='js-publication']/span")[0]->textContent;
echo $xpath->query("//a[@class='js-publication']")[0]->getAttribute('href');

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Ideone 演示