循环遍历DOM树并删除不需要的标签？ [英] Recursively loop through the DOM tree and remove unwanted tags?

问题描述

$tags = array(
    "applet" => 1,  
    "script" => 1
);

$html = file_get_contents("test.html");
$dom = new DOMdocument();
@$dom->loadHTML($html);
$xpath = new DOMXPath($dom);
$body = $xpath->query("//body")->item(0);

我正在循环浏览网页的正文，并删除所有不需要的标签$ tags数组，但我找不到方法。那么我该怎么办？

I'm about looping through the "body" of the web page and remove all unwanted tags listed in the $tags array but I can't find a way. So how can I do it?

推荐答案

$tags = array(
    "applet" => 1,  
    "script" => 1
);

$html = file_get_contents("test.html");
$dom = new DOMdocument();
@$dom->loadHTML($html);
$xpath = new DOMXPath($dom);

for($i=0; $i<count($tags); ++$i) {
   $list = $xpath->query("//".$tags[$i]);
   for($j=0; $j<$list->length; ++$j) {
      $node = $list->item($j);
      if ($node == null) continue;
      $node->parentNode->removeChild($node);
   }
}

$string = $dom->saveXML();

这样的事情。

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