PHP DOMDocument 解析 HTML

Question

我有以下 HTML 标记

<div contenteditable="true" class="text"></div>
<div contenteditable="true" class="text"></div>
<div style="display: block;" class="ui-draggable">
    <img class='avatar' src=""/>
    <p style="">
    <img class='pic' src=""/><br>
    <span class='fulltext' style="display:none"></span>
    </p>-<span class='create'></span>
    <a class='permalink' href=""></a>
    </div>
 <div contenteditable="true" class="text"></div>
 <div style="display: block;" class="ui-draggable">
    <img class='avatar' src=""/>
    <p style="">
    <img class='pic' src=""/><br>
    <span class='fulltext' style="display:none"></span>
    </p><span class='create'></span><a class='permalink' href=""></a>
    </div>

父 div 可以更多。为了解析信息并将其插入到数据库中，我使用以下代码 -

$dom = new DOMDocument();
$dom->loadHTML($xml);
$xpath = new DOMXPath($dom);
$div = $xpath->query('//div');
$i=0;
$q=1;
foreach($div as $book) {
    $attr = $book->getAttribute('class');
    //if div contenteditable
    if($attr == 'text') {
        echo '</br>'.$book->nodeValue."</br>";  
    }
    
    else {
        $new = new DOMDocument();
        $newxpath = new DOMXPath($new);
        $avatar = $xpath->query("(//img[@class='avatar']/@src)[$q]");
        
        $picture = $xpath->query("(//p/img[@class='pic']/@src)[$q]");
        $fulltext = $xpath->query("(//p/span[@class='fulltext'])[$q]");
        $permalink = $xpath->query("(//a[@class='permalink'])[$q]");
        echo $permalink->item(0)->nodeValue; //date
        echo $permalink->item(0)->getAttribute('href');
        echo $fulltext->item(0)->nodeValue;
        echo $avatar->item(0)->value;
        echo $picture->item(0)->value;
        $q++;
    }
    $i++;
}

但我认为有更好的方法来解析 HTML。有没有？预先感谢您

Answer 1

请注意 DOMXPath::query 支持第二个参数 contextparam 。此外，您不需要在循环内使用第二个 DOMDocument 和 DOMXPath。使用:

$avatar = $xpath->query("img[@class='avatar']/@src", $book);

获取<img src="">相对于 div 节点的属性节点。如果您遵循我的建议，您的示例应该没问题。

---

这是遵循上述内容的代码版本:

$dom = new DOMDocument();
$dom->loadHTML($xml);

$xpath = new DOMXPath($dom);
$divs = $xpath->query('//div');

foreach($divs as $book) {
    $attr = $book->getAttribute('class');
    if($attr == 'text') {
        echo '</br>'.$book->nodeValue."</br>";  
    } else {
        $avatar = $xpath->query("img[@class='avatar']/@src", $book);
        $picture = $xpath->query("p/img[@class='pic']/@src", $book);
        $fulltext = $xpath->query("p/span[@class='fulltext']", $book);
        $permalink = $xpath->query("a[@class='permalink']", $book);
        echo $permalink->item(0)->nodeValue; //date
        echo $permalink->item(0)->getAttribute('href');
        echo $fulltext->item(0)->nodeValue;
        echo $avatar->item(0)->value;
        echo $picture->item(0)->value;
    }
}