simplexml 不加载 <a> 标记类？

Question

我有一点 php 从页面抓取 html 并将其加载到 simplexml 对象中。但是它没有得到

中元素的 classes

php

//load the html page with curl
$html = curl_exec($ch);
curl_close($ch);

$doc = new DOMDocument();
$doc->loadHTML($html);
$sxml = simplexml_import_dom($doc);

页面html。如果我执行 $html 的 var_dump 显示它已被删除并存在于 $html

    <li class="large">
        <a style="" id="ref_3" class="off" href="#" onmouseover="highlightme('07');return false;" onclick="req('379');return false;" title="">07</a>
    </li>

$doc 和 $sxml 的 var_dump（下）显示 'off' 的 class 现在丢失了。不幸的是，我需要根据此 class.

处理页面

            [8]=>
             object(SimpleXMLElement)#50 (2) {
              ["@attributes"]=>
              array(1) {
                ["class"]=>
                string(16) "large"
              }
              ["a"]=>
              string(2) "08"
            }

Answer 1

使用 simplexml_load_file 和 xpath，查看内联注释。

一旦找到您需要的元素，您所追求的就是这个

$row->a->attributes()->class=="off"

完整代码如下：

// let's take all the divs that have the class "stff_grid"
$divs = $xml->xpath("//*[@class='stff_grid']");

// for each of these elements, let's print out the value inside the first p tag
foreach($divs as $div){
    print $div->p->a . PHP_EOL;

    // now for each li tag let's print out the contents inside the a tag
    foreach ($div->ul->li as $row){

        // same as before
        print "  - " . $row->a;
        if ($row->a->attributes()->class=="off") print " *off*";
        print PHP_EOL;

        // or shorter
        // print "  - " . $row->a . (($row->a->attributes()->class=="off")?" *off*":"") . PHP_EOL;

    }
}
/* this outputs the following
Person 1
  - 1 hr *off*
  - 2 hr
  - 3 hr *off*
  - 4 hr
  - 5 hr
  - 6 hr *off*
  - 7 hr *off*
  - 8 hr
Person 2
  - 1 hr
  - 2 hr
  - 3 hr
  - 4 hr
  - 5 hr
  - 6 hr
  - 7 hr *off*
  - 8 hr *off*
Person 3
  - 1 hr
  - 2 hr
  - 3 hr
  - 4 hr *off*
  - 5 hr
  - 6 hr
  - 7 hr *off*
  - 8 hr
*/

simplexml 不加载 <a> 标记类？

simplexml doesnt load <a> tag classes?

php

html

web-scraping

simpledom

simplexml 不加载 <a> 标记 类？

simplexml doesnt load <a> tag classes?

php

html

web-scraping

simpledom

simplexml 不加载 <a> 标记类？