我想使用 PHP 和 DOMXpath 從外部網站檢索事件鏈接和文本。外部網站html結構如下；<!-- first --><div class="col-sm-12 col-lg-3 me recording-item"> <div class="recording-item-inner"> <a class="col-sm-12 recording-name" href="/recordings/191"> <div class="info"> <b>Daily Event</b><br> <small>29 Jun 2020</small> </div></a> </div></div><!-- second --><div class="col-sm-12 col-lg-3 me recording-item"> <div class="recording-item-inner"> <a class="col-sm-12 recording-name" href="/recordings/190"> <div class="info"> <b>Daily Event B</b><br> <small>26 Jun 2020</small> </div></a> </div></div><!-- third --><div class="col-sm-12 col-lg-3 me recording-item"> <div class="recording-item-inner"> <a class="col-sm-12 recording-name" href="/recordings/189"> <div class="info"> <b>Daily Event C</b><br> <small>22 Jun 2020</small> </div></a> </div></div>我正在嘗試檢索最新的 5 個事件名稱、日期和鏈接。目前我可以使用下面的代碼獲取最新的（單個）事件。<?phpfunction getEvents(){ $page = file_get_contents('https://example.com/events'); $rootUrl = 'https://example.com'; @$doc = new DOMDocument(); @$doc->loadHTML($page); $xpath = new DomXPath($doc); $nodeList = $xpath->query("//div[@class='recording-item']"); $node = $nodeList->item(0); $href = $xpath->evaluate("string(//div[@class='recording-item-inner']/a/@href)"); $eventUrl = $rootUrl . $href; return $eventUrl;}?>我如何修改此代碼，以便它檢索 5 個最近的事件詳細信息并打印出簡單的項目列表；<ul> <li>Event 1 - [name], [date], [href]</li> <li>Event 2 - [name], [date], [href]</li> <li>Event 3 - [name], [date], [href]</li> <li>Event 4 - [name], [date], [href]</li> <li>Event 5 - [name], [date], [href]</li></ul>
1 回答
ITMISS
TA貢獻1871條經驗 獲得超8個贊
這是可以做到的，但由于 xpath 支持有限，它不是最優雅的解決方案。
從 開始$nodeList；鑒于您的示例 xml 只有 3 個事件，此代碼將輸出有關前兩個事件的所需信息。顯然，您可以根據實際代碼修改它：
$nodeList = $xpath->query('//div[./div[@class="recording-item-inner"]]//div[@class="info"]');
$i = 1;
echo htmlspecialchars("<ul>", ENT_QUOTES);
echo "<br>";
foreach($nodeList as $result) {
if ($i++ > 2) break;
echo htmlspecialchars("<li>", ENT_QUOTES);
echo "Event 1 - " . $result->childNodes[1]->textContent . ", ";
echo $result->childNodes[4]->textContent . ", ";
echo $result->parentNode->getAttribute('href');
echo htmlspecialchars("</li>", ENT_QUOTES);
echo "<br>";
}
echo htmlspecialchars("</ul>", ENT_QUOTES);
輸出：
<ul>
<li>Event 1 - Daily Event, 29 Jun 2020, /recordings/191</li>
<li>Event 1 - Daily Event B, 26 Jun 2020, /recordings/190</li>
</ul>
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