Question

使用PHP和XPATH，您如何正确获取包含斯托克城与水晶宫匹配日期的最近h3标签的文本？（例如10月4日星期六）
本质上我正在寻找比赛日期，我的输入是主队和客场球队

HTML片段列表4（其余321个）2014/15赛季英超联赛足球赛事

<div class="fixtures">
    <h3>Monday 29 September</h3>
    <dl class="matches">
        <dt class="match">
            <span class="match-time">20:00</span>
            <span class="home-side">
                <span>
                    <img src="http://omo.akamai.opta.net/image.php?&amp;sport=football&amp;entity=team&amp;description=badges&amp;dimensions=20&amp;id=110" alt="Stoke City">
                </span>
                <a href="http://www.dailymail.co.uk/sport/teampages/stoke-city.html">Stoke City</a>
            </span>
            <span>
                <span>&nbsp;</span>
                <span>vs</span>
                <span>&nbsp;</span>
            </span>
            <span class="away-side">
                <span>
                    <img src="http://omo.akamai.opta.net/image.php?&amp;sport=football&amp;entity=team&amp;description=badges&amp;dimensions=20&amp;id=4" alt="Newcastle United">
                </span>
                <a href="http://www.dailymail.co.uk/sport/teampages/newcastle-united.html">Newcastle United</a>
            </span>
        </dt>
    </dl>
    <dl class="matches">
        <dt class="match">
            <span class="match-time">15:00</span>
            <span class="home-side">
                <span>
                    <img src="http://omo.akamai.opta.net/image.php?&amp;sport=football&amp;entity=team&amp;description=badges&amp;dimensions=20&amp;id=13" alt="Leicester City">
                </span>
                <a href="http://www.dailymail.co.uk/sport/teampages/leicester.html">Leicester City</a>
            </span>
            <span>
                <span>&nbsp;</span>
                <span>vs</span>
                <span>&nbsp;</span>
            </span>
            <span class="away-side">
                <span>
                    <img src="http://omo.akamai.opta.net/image.php?&amp;sport=football&amp;entity=team&amp;description=badges&amp;dimensions=20&amp;id=90" alt="Burnley">
                </span>
                <a href="http://www.dailymail.co.uk/sport/teampages/burnley.html">Burnley</a>
            </span>
        </dt>
    </dl>              
    <h3>Saturday 4 October</h3>
    <dl class="matches">
        <dt class="match">
            <span class="match-time">15:00</span>
            <span class="home-side">
                <span>
                    <img src="http://omo.akamai.opta.net/image.php?&amp;sport=football&amp;entity=team&amp;description=badges&amp;dimensions=20&amp;id=14" alt="Liverpool">
                </span>
                <a href="http://www.dailymail.co.uk/sport/teampages/liverpool.html">Liverpool</a>
            </span>
            <span>
                <span>&nbsp;</span>
                <span>vs</span>
                <span>&nbsp;</span>
            </span>
            <span class="away-side">
                <span>
                    <img src="http://omo.akamai.opta.net/image.php?&amp;sport=football&amp;entity=team&amp;description=badges&amp;dimensions=20&amp;id=35" alt="West Bromwich Albion">
                </span>
                <a href="http://www.dailymail.co.uk/sport/teampages/west-bromwich-albion.html">West Bromwich Albion</a>
            </span>
        </dt>
    </dl>            
    <dl class="matches">
        <dt class="match">
            <span class="match-time">15:00</span>
            <span class="home-side">
                <span>
                    <img src="http://omo.akamai.opta.net/image.php?&amp;sport=football&amp;entity=team&amp;description=badges&amp;dimensions=20&amp;id=110" alt="Stoke City">
                </span>
                <a href="http://www.dailymail.co.uk/sport/teampages/stoke-city.html">Stoke City</a>
            </span>
            <span>
                <span>&nbsp;</span>
                <span>vs</span>
                <span>&nbsp;</span>
            </span>
            <span class="away-side">
                <span>
                    <img src="http://omo.akamai.opta.net/image.php?&amp;sport=football&amp;entity=team&amp;description=badges&amp;dimensions=20&amp;id=31" alt="Crystal Palace">
                </span>
                <a href="http://www.dailymail.co.uk/sport/teampages/crystal-palace.html">Crystal Palace</a>
            </span>
        </dt>
    </dl>          
</div>

Answer 1

如果结构总是相同的，你可以先用那个alt值指向那个img标签，然后向后遍历它。

示例：

$dom = new DOMDocument();
$dom->loadHTML($markup);
$xpath = new DOMXpath($dom);

$needle = 'Hull City';
$element = $xpath->query("//span/img[contains(@alt, '$needle')]");
if($element->length > 0) {
    $img = $element->item(0);
    $header = $xpath->query('ancestor::node()/preceding-sibling::h3[1]', $img);
    if($header->length > 0) {
        echo $header->item(0)->nodeValue; // Saturday 4 October
    }
}

Sample Output

Answer 2

你可以尝试这个XPath：

//h3[following-sibling::dl[1][.//span[contains(concat(' ', normalize-space(@class), ' '), ' home-side ') and span/img[@alt='Hull City']]]]

基本上，在XPath之上选择<h3>元素，其下一个同级<dl>元素包含<span class="home-side">，另一个<span>包含<img alt="Hull City">（格式化版本）：

//h3[
        following-sibling::dl[1][
                    .//span[
                        contains(concat(' ', normalize-space(@class), ' '), ' home-side ') 
                            and 
                        span/img[@alt='Hull City']
                    ]
        ]
    ]

更新：

以下是一个XPath示例，用于检查主队和客队：

//h3[
        following-sibling::dl[1][
                    .//span[
                        contains(concat(' ', normalize-space(@class), ' '), ' home-side ') 
                            and 
                        span/img[@alt='Hull City']
                    ]
                        and
                    .//span[
                        contains(concat(' ', normalize-space(@class), ' '), ' away-side ') 
                            and 
                        span/img[@alt='Crystal Palace']
                    ]
        ]

    ]

更新2：

为了能够考虑多个<dl>，我认为首先找到满足主客场标准的<dl>会更容易，然后向后移动以找到最接近的<h3>元素来自<dl>：

//dl[
        .//span[
            contains(concat(' ', normalize-space(@class), ' '), ' home-side ') 
                and 
            span/img[@alt='Stoke City']
        ]
            and
        .//span[
            contains(concat(' ', normalize-space(@class), ' '), ' away-side ') 
                and 
            span/img[@alt='Crystal Palace']
        ]
    ]/preceding-sibling::h3[1]

使用PHP和XPATH，你如何获得最接近的`h3`的内容？

2 个答案: