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从 php 简单 html dom 获取所有标题标记
原标题:get all header tags from php simple html dom

我使用简单的 html dom 来做一些刮痕, 并想知道是否有办法 收集所有 H 标签的集合 在一击 - 即 H1 H2 H3 等...

排序顺序的某个

$HTags = $html->find("h*");

然后,我还需要知道它的确切标签 - 等。

任何感谢的帮助

问题回答

你可以做一些类似

foreach($html->find( h1,h2,h3 ) as $element){

尝试 $xpathat & gt; query

示例:

/* The following example finds <h1> and <h2> tags in a html String and sets id to it. The html-code will be printed.*/
$html = "<h2>test2</h2><h1>test1</h1><h3>test3</h3>";
$dom = new DOMDocument();
@$dom->loadHTML($html, LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD);
$xpath = new DOMXpath($dom);
$htags = $xpath->query( //h1 | //h2 );
foreach($htags as $htag)
    $htag->setAttribute( id ,  test );

echo htmlentities($dom->saveHTML());




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