DOMXPath不起作用

Question

我正在尝试在网上商店获取产品价格，但DOMXPath似乎没有用。

服务器正在运行php 5.5并启用了LibXML。 不返回错误，仅返回零长度。

 ini_set('display_errors',1);
ini_set('display_startup_errors',1);
error_reporting(-1);
session_start();

$xmlsource = 'https://tennistoko.nl/product/professional-supreme-comfort-grip-3-st';

$d = new DOMDocument();
$d->loadHTML($xmlsource);
$xpath = new DOMXPath($d);




$nodes = $xpath->query('//*[@itemprop]');  //this catches all elements with itemprop attribute
foreach ($nodes as $node) { 
   // do your stuff here with $node
   print_r($node);
}    


print_r($nodes);

Answer 1

loadHTML用于从字符串加载HTML，从文件或url使用loadHTMLFile加载 。

$xmlsource = 'https://tennistoko.nl/product/professional-supreme-comfort-grip-3-st';

$d = new DOMDocument();
@$d->loadHTMLFile($xmlsource);      // @ if for suppressing warnings
$xpath = new DOMXPath($d);

$nodes = $xpath->query('//*[@itemprop]');  //this catches all elements with itemprop attribute
foreach ($nodes as $node) { 
   // do your stuff here with $node
   print_r($node);
} 

Answer 2

尝试在网址末尾添加/，否则文档为空，并按照Danijel的建议使用loadHTMLFile：

$xmlsource = 'https://tennistoko.nl/product/professional-supreme-comfort-grip-3-st/';//changed your code here
$d = new DOMDocument();
@$d->loadHTMLFile($xmlsource);      // @ if for suppressing warnings
$xpath = new DOMXPath($d);
$nodes = $xpath->query('//*[@itemprop]');  //this catches all elements with   itemprop attribute
foreach ($nodes as $node) { 
  // do your stuff here with $node
  print_r($node);
}