如何使用xpath从谷歌财务中提取股票的价格？

Question

我似乎无法通过我的xpath查询来查找它。

$pathTemplate =  "https://www.google.com/finance?q=";

echo "Enter the stock symbol of the stock you want to check\n";
$foo = fgets(STDIN);

$html = new DOMDocument();
$html -> loadHTML($pathTemplate . $foo);
$xpath = new DOMXPath($html);
$price = $xpath -> query("//span[@class = 'pr']/span/text()");
echo $price -> item(0);

I got a screenshot of the developer tools window

Answer 1

使用xpath时，应该规范化（总是）类，以便能够正确处理class="class1 class2"标记。

获得所需内容的最佳方式是首先定位ID="price-panel"。

在完整的工作代码段下方，您忘记了file_get_contents，因此您尝试将网址解析为HTML而不是实际的HTML; - ）

$pathTemplate =  "https://www.google.com/finance?q=";

echo "Enter the stock symbol of the stock you want to check\n";
$foo = fgets(STDIN);

$html = file_get_contents($pathTemplate . $foo);
$dom = new DOMDocument();
@$dom -> loadHTML($html);


$xpath = new DOMXPath($dom);
$price = $xpath -> query(" //div[@id='price-panel']//span[contains(concat(' ', normalize-space(@class), ' '), ' pr ')]/span");
$price = $price->item(0)->nodeValue;

echo $price;