duanchazhou6779 2017-02-20 08:08
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如何使用xPath进行跟踪

I got div "rso" data in php Dom by using getElementById('rso') but php does not allow to get by "ClassName" , i need to get all "child" of <div class =srg> and then tag "href" inside that.

<div id=”rso”>
    <div class= “_Nid”>
        <div class = “srg”>
            <div class =”g”> 
                <div class=”rc”>
                    <h3 class = “r”>
                        <a href >
                    </h3>
                </div> 
            </div>
            <div class =”g”>...</div>
            <div class =”g”>...</div>
            <div class =”g”>...</div>
        </div>
    </div>
</div>

can you please tell how it can be done. or what xPath will be used if it can work here.

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  • doo58088 2017-02-20 08:27
    关注
    <?php
    $html = <<<HTML
    <div id="rso">
        <div class="_Nid">
            <div class="srg">
                <div class="g"> 
                    <div class="rc">
                        <h3 class="r">
                            <a href="http://my.site.com/lol.txt" >
                        </h3>
                        <h3 class="r">
                            <a href="http://my.site.com/lol2.txt" >
                        </h3>
                        <h3 class="r">
                            <a href="http://my.site.com/lol23.txt" >
                        </h3>
                    </div> 
                </div>
                <div class="g">...</div>
                <div class="g">...</div>
                <div class="g">...</div>
            </div>
        </div>
    </div>
    HTML;
    
    $dom = new DOMDocument;
    $dom->loadHTML($html);
    $domxpath = new DOMXPath($dom);
    $filtered =  $domxpath->query('//div[@class="srg"]//a/@href');
    foreach ($filtered as $item) {
        echo "$item->value
    ";
    }
    
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