如何从网站获取值（在PHP中使用cUrl） [英] How to pull a value from a website ( Using cUrl in PHP)

问题描述

我正在尝试以下脚本从某个网站提取值，但是我认为这不是有效的DOM文档，我想知道是否还有其他方法？

I am trying the following script to pull a value from a certain website, however I think this is not a valid DOM Document, I want to know if there is an alternate way?

       <?php
      $curl_handle=curl_init();
      curl_setopt($curl_handle,CURLOPT_URL,'http://www.indiagoldrate.com/gold-rate-in-mumbai-today.htm');
      curl_setopt($curl_handle,CURLOPT_CONNECTTIMEOUT,2);
      curl_setopt($curl_handle,CURLOPT_RETURNTRANSFER,1);
      $buffer = curl_exec($curl_handle);
      curl_close($curl_handle);
      if (empty($buffer))
      {
          print "Sorry, example.com are a bunch of poopy-heads.<p>";
      }
      else
      {
          print $buffer;
      }
      ?>

推荐答案

尽管代码中的页面（ http://www.indiagoldrate.com/gold-rate-in-mumbai-today.htm ）不是有效的DOM文档，您仍然可以使用PHP的 DOMDocument 。
例如，今天我们在孟买市获得1g 22k黄金的价格：

Though the page in your code (http://www.indiagoldrate.com/gold-rate-in-mumbai-today.htm) is not a valid DOM document, you still can parse it with PHP's DOMDocument. For example here we'll get the price of 1g 22k gold in Mumbay city today:

libxml_use_internal_errors(true); //get rid of the warnings

$dom = new DOMDocument;
$dom->loadHTML($buffer);
$xp = new DOMXPath($dom);
$price = $xp->query('//*[@id="right_center"]/table[1]/tr[3]/td[2]/table/tr[1]/td[2]')->item(0)->nodeValue;

libxml_clear_errors();
libxml_use_internal_errors(false);

var_dump($price);

这篇关于如何从网站获取值（在PHP中使用cUrl）的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！