dongzhuoxie1244
2014-06-15 18:49 阅读 35
已采纳

使用php从谷歌财务中抓取数据

I am trying to scrap data off google finance using php..I am trying to extract the usd to zar conversion rate from google finance site...There seems to be some sort of error in the regular expression i am using...could someone please suggest me the correct method...Below is my code...

<?php
$page = file_get_contents('https://www.google.com/finance?q=USDZAR');
echo $page;
preg_match("/<span class=\"bld\".*span>/", $page, $conversion_rate);
print_r($conversion_rate);

?>

I am getting am empty array

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1条回答 默认 最新

  • 已采纳
    dongzang5815 dongzang5815 2014-06-15 19:52

    I would use a DOM parser and XPath to select the content of that span tag. Like this:

    $url = 'https://www.google.com/finance?q=USDZAR';
    
    $doc = new DOMDocument();
    @$doc->loadHTMLFile($url);
    
    $selector = new DOMXPath($doc);
    $span = $selector->query('//span[@class="bld"]')->item(0);
    
    var_dump($span->nodeValue);
    
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