php - 使用php提取html内容

Question

我有以下代码：

$html = file_get_contents("http://www.jabong.com/giordano-Dtlm60058-Black-Analog-Watch-267058.html");

$dom = new DOMDocument();


$xpath = new DOMXPath($dom);
$nodes = $xpath->query('//*[@id="price_div"]/div[2]/span[2]');  //this catches all elements with 
var_dump($nodes); 

我想从页面中提取价格。但是这个 xpath 并没有给我结果。

Answer 1

你有没有解决过这个问题？这是一些工作代码：

$html = file_get_contents("http://www.jabong.com/giordano-Dtlm60058-Black-Analog-Watch-267058.html");

//suppress errors (there is a lot on the page in question)
libxml_use_internal_errors(true);

//dont preserve whitespaces
$page->preserveWhiteSpace = false;

$dom = new DOMDocument();
//as @Larry.Z comments, you forgot to load the $html
$dom->loadHTML($html);

$xpath = new DOMXPath($dom);

//assuming there can be more than one "price set" on each page
$prices = array();

$price_divs = $xpath->query('//div[@id="price_div"]');
foreach ($price_divs as $price_div) {
    $price=array();
    foreach ($price_div->childNodes as $price_item) {
        $content=trim($price_item->textContent);
        if ($content!='') $price[]=$content;
    } 
    $prices[]=$price;
}

echo '<pre>';
print_r($prices);
echo '</pre>';

输出

Array
(
    [0] => Array
        (
            [0] => Save 66%
            [1] => Rs. 5850
            [2] => Rs. 1999
        )

)

您可以跳过该$prices[]部分，仅$price在每页设置的价格永远不会超过一个时使用。