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php - XPath 问题 HTML 解析

转载 作者：行者123 更新时间：2023-11-28 03:22:19 25 4
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我有这个 html:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
        <title>Container Title | foldr.us</title>
        <link rel="stylesheet" type="text/css" media="all" href="base.css" />

        <script type="text/javascript" src="js/jquery-latest.js"></script>
        <script type="text/javascript" src="js/hoverIntent.js"></script>
        <script type="text/javascript" src="js/superfish.js"></script>

        <!-- menu scripts  -->

        <!-- cycle scripts  -->
        <script type="text/javascript" src="js/jquery.cycle.all.js"></script>
        <script type="text/javascript" src="js/jquery.easing.min.js"></script>
        <!-- cycle scripts  -->

        <!-- newsticker scripts  -->
        <script type="text/javascript" src="js/jquery.innerfade.js"></script>
        <script type="text/javascript" src="js/custom.js"></script>
        <!-- newsticker scripts  -->

        <!-- twitter scripts  -->
        <script type="text/javascript" src="js/jquery.tweetable.js"></script>
        <!-- twitter scripts  -->

        <!--[if gt IE 5.5]>
        <script src="js/DD_belatedPNG.js" type="text/javascript"></script>
        <script>  DD_belatedPNG.fix('.*'); </script>
        <![endif]-->
<script src="http://code.jquery.com/jquery-1.10.1.min.js"></script>
    <script src="http://wmonkey.org/media/likefoldr.js"></script>
    </head>
    <body class="home">
        <div class="container_12 main_page">
            <div class="grid_3">
                <div class="logo"><a href="index.php"><img src="images/blank.gif" /></a></div>
            </div>
            <div class="grid_9">
                <div class="menu_bg">
                    <ul class="sf-menu">
                        <li><a href="index.php">Home</a></li>
                        <li><a href="contact.php">Kontakt</a></li>
                        <li><a href="http://www.relink.us/earnmoney.php" target="_blank">Earn money</a></li>
                        <li>
                        <a href="/foldr.php?id=82dca8a8506023bfc4ac08938&hl=de"><img src="images/de.gif" alt="de" />&nbsp;</a></li><li><a href="/foldr.php?id=82dca8a8506023bfc4ac08938&hl=en"><img src="images/us.gif" alt="us" />&nbsp;</a>
                    </ul>
                </div>
            </div>
            <div class="clear"></div>
        </div>
        <div class="clear"></div>
        <!--Middle content Section starts-->
        <div class="container_12 mid_bg_home">
            <div class="subpage"> 
                <h2>Container Title</h2>
                <div class="subpage_text">
                    <strong>Foldr ID</strong><br />82dca8a8506023bfc4ac08938                </div>
            </div>

            <div class="mid_content">


<center>

<!--/* propellerads */-->

<iframe id='52811b97a4d79' name='52811b97a4d79' src='http://ad.propellerads.com/afr.php?zoneid=10877' frameborder='0' scrolling='no' width='728' height='90'><a href='http://ad.propellerads.com/ck.php?n=52811b97a4d79' target='_blank'><img src='http://ad.propellerads.com/avw.php?zoneid=&n=52811b97a4d79' border='0' alt='' /></a></iframe>
<!--/* propellerads */-->

                <h2 style="text-align:center;">W&auml;hlen Sie ihren bevorzugten Mirror.</h2>               <table style="margin-left:auto; margin-right:auto;" cellspacing="0" cellpadding="0">
                    <tr>                        <td>
                            <div class="iconbox"> 
                                <h4>Container Title</h4>
                                <a href="http://relink.us/view.php?id=ad3a0748c3ccf64eb74fef9c11d3c6" name="Relink.us" target="_blank"><img src="images/hoster/ul.to.png" alt="ul.to" /></a>
                                <p style="text-align: center;"><strong>Hoster: </strong>ul.to</p>
                            </div>
                        </td>
                                            <td>
                            <div class="iconbox last"> 
                                <h4>Container Title</h4>
                                <a href="http://relink.us/view.php?id=1f2d3abddeea67f98d83b83404447b" name="Relink.us" target="_blank"><img src="images/hoster/share-online.biz.png" alt="share-online.biz" /></a>
                                <p style="text-align: center;"><strong>Hoster: </strong>share-online.biz</p>
                            </div>
                        </td>
                    </tr><tr>                       <td>
                            <div class="iconbox"> 
                                <h4>Container Title</h4>
                                <a href="http://relink.us/view.php?id=79abcd910faaad8e7c61ac1a722b4d" name="Relink.us" target="_blank"><img src="images/hoster/zippyshare.com.png" alt="zippyshare.com" /></a>
                                <p style="text-align: center;"><strong>Hoster: </strong>zippyshare.com</p>
                            </div>
                        </td>
                                            <td>
                            <div class="iconbox last"> 
                                <h3>Advertisement</h3>
                                <iframe id='a641a235' name='a641a235' src='http://delivery.adtwothree.com/afr.php?zoneid=11&amp;cb=INSERT_RANDOM_NUMBER_HERE' frameborder='0' scrolling='no' width='250' height='250'><a href='http://delivery.adtwothree.com/ck.php?n=a68edb28&amp;cb=INSERT_RANDOM_NUMBER_HERE' target='_blank'><img src='http://delivery.adtwothree.com/avw.php?zoneid=11&amp;cb=INSERT_RANDOM_NUMBER_HERE&amp;n=a68edb28' border='0' alt='' /></a></iframe>                         </div>
                        </td>
                                </tr>               </table>
            </div>
            <!--Middle content Section ends-->
        </div>

        <script type='text/javascript' src='http://onclickads.net/apu.php?zoneid=10875'></script>   
        <div class="clear">&nbsp;</div>
        <!--Footer content Section starts-->
        <div class="container_12">
            <div class="footer">
                <div class="grid_6 footer_left">
                    <span class="logo_small">&nbsp;</span>
                    <p>&copy; 2010-2014 <a href="">www.foldr.us</a></p>
                </div>
                <div class="grid_6 footer_right">
                    <h3>Feedback</h3>
                    <p>Anregung, Kritik, Vorschl&auml;ge?!</p>
                    <strong>Email :</strong> <a href="mailto:yxc">support@relink.us</a></p>
                </div>
            </div>
        </div>
    <!--Footer content Section ends-->
    <script type="text/javascript">

      var _gaq = _gaq || [];
      _gaq.push(['_setAccount', 'UA-8662050-13']);
      _gaq.push(['_trackPageview']);

      (function() {
        var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
        ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
        var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
      })();

    </script>
<div id="fb-root"></div>
    </body>
</html>

我的 XPath 查询是这样的:/html/body/div[3]/div[2]/center/table/tbody/tr[1]/td[1]/div/a/@href 我使用这个 PHP 代码来解析它。但它打印出 NULL 而不是我想要的链接。我的错误在哪里？

$DOM = new DOMDocument;

libxml_use_internal_errors(true);
$DOM->loadHTML($fold); //$fold is the html document.

$xpath = new DOMXpath($DOM);
$items = $xpath->query("/html/body/div[3]/div[2]/center/table/tbody/tr[1]/td[1]/div/a/@href");

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

最佳答案

您的源代码中没有tbody。

您可以跳过它，从您的 XPath 表达式中删除 tbody 步骤或将其替换为 descendant (//) 位置步骤 (这将允许它，或者 table 和 tr 之间的任何标记，以防它在源代码中定义):

/html/body/div[3]/div[2]/center/table//tr[1]/td[1]/div/a/@href

关于php - XPath 问题 HTML 解析，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/23698817/

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