Question

在下面的代码中，无论是否存在，优惠券值始终为空白。

我试图仅在优惠券存在时提取代码和标题，但它不会工作 - 它只会返回一个空白页。

$url="http://www.grabon.in/amazon-coupons/";
$storename="AMAZON";

$curl_handle=curl_init();
curl_setopt($curl_handle, CURLOPT_URL,$url);
curl_setopt($curl_handle, CURLOPT_CONNECTTIMEOUT, 2);
curl_setopt($curl_handle, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl_handle, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows; U; Windows NT 5.1; rv:1.7.3) Gecko/20041001 Firefox/0.10.1');
$html = curl_exec($curl_handle);
curl_close($curl_handle);

$mydoc = new DOMDocument();

libxml_use_internal_errors(TRUE); //disable libxml errors

if(empty($html)) die("EMPTY HTML");
    //echo ($html);
    $mydoc->loadHTML($html);
    libxml_clear_errors(); //remove errors for yucky html

    $my_xpath = new DOMXPath($mydoc);


    $nodes = $my_xpath->query( '//div[@id="category_coupons"]' );

    foreach( $nodes as $node )
    {


        $code=$my_xpath->query( 'article[@class="sm-coupon"]/div[@class="smc-actions"]/div[@class="smc-actions-r"]/div[@class="sm-code"]/span', $node );
        if ($code->length>0){

           $coupon = $code->item(0)->nodeValue ;
           $title  = $my_xpath->query( 'article[@class="sm-coupon"]/div[@class="smc-info"]/h3', $node )->item(0)->nodeValue;


        echo $storename.",".$title.",".$coupon."<br>";

        }


     }

Answer 1

我不熟悉您使用的语法，但我想您想使用找到的nodes来查找子文章......如果是这样，您需要使用XPath之类的

./article[@class="sm-coupon"]/div[@class="smc-info"]/h3

在./元素上node点，只使用

article[@class="sm-coupon"]...

未指定./表示您需要root article元素

<强>更新

如果您只想获得包含代码的articles的标题，请使用以下XPath：

//div[@class="smc-actions" and ./descendant::div[@class="sm-code"]/span[text()]]/preceding-sibling::div[@class="smc-info"]/h3

代码的

XPath只是

//div[@class="sm-code"]/span[text()]

最终代码：

$titles = $my_xpath->query( '//div[@class="smc-actions" and./descendant::div[@class="sm-code"]/span[text()]]/preceding-sibling::div[@class="smc-info"]/h3' );
$coupons = $my_xpath->query( '//div[@class="sm-code"]/span[text()]' );
foreach(range(0, $titles->length-1) as $index)
{ echo $storename.",".$titles->item($index)->nodeValue.",".$coupons->item($index)->nodeValue."<br>"; }

xpath不返回或刮取值

1 个答案: