使用 xPath 获取价格（使用大于）

Question

如何使用以下 xPath 示例：

//book[price>35.00]

有了这个（因为美元符号是静态的）：

<div class="book"><span class="price"></span></div>

-------------------- 从答案编辑 ------------------

    $vu_link = get_field('vu_link');

    $ch3 = curl_init($vu_link);
    curl_setopt($ch3, CURLOPT_RETURNTRANSFER, true);
    $cl3 = curl_exec($ch3);

    $dom3 = new DOMDocument();
    @$dom3->loadHTML($cl3);
    $xpath3 = new DOMXpath($dom3);

    $price3 = $xpath3->query("//div[@class = 'price-box' and substring(span[@class = 'price'], 2) > 100]");

    foreach ($xpath->query($price3) as $node) {
    echo $dom->saveXML($node), "\n";
    }

Answer 1

您可以使用给定的 xpath

/div[@class="book"]/span[@class="price"]/text()

Answer 2

您需要符合以下行的 xpath 表达式：

//div[@class = 'book' and substring(span[@class = 'price'], 2) > 35]

示例：

$xml = <<<'XML'
<root>
<div class="book"><span class="price"></span></div>
<div class="book"><span class="price"></span></div>
<div class="book"><span class="price"></span></div>
<div class="book"><span class="price"></span></div>
</root>
XML;

$dom = new DOMDocument();
$dom->loadXML($xml);
$xpath = new DOMXPath($dom);

$query = "//div[@class = 'book' and substring(span[@class = 'price'], 2) > 35]";

foreach ($xpath->query($query) as $node) {
    echo $dom->saveXML($node), "\n";
}

输出：

<div class="book"><span class="price"></span></div>

使用 xPath 获取价格（使用大于）

Using xPath to get price (using greater than)

php

regex

xpath

示例：

输出：