如何检查每个 HTML 标签是否已关闭? [英] How can i check if every HTML tag is closed?

问题描述

我有这个问题:

用户可以添加 HTML 描述，它将显示在他的个人资料中；当我显示用户列表时，我也希望显示此描述.
因为它可能太长，我将把它限制在一个固定的长度，但这样做我可能会破坏 HTML 语法而留下一些标签.

user can add an HTML description and it will be shown on his profile; when i show the user list, i'd wish to show this description, too.
since it could be too long, i'm going to cap it to a fixed lenght, but doing this i could break the HTML syntax leaving some tags open.

我如何检查一切是否正常，并在需要时关闭任何打开的标签?

how can i check if everthing is ok and, if needed, close any open tag?

推荐答案

@tampe125 这不是我的代码，但它看起来有效.

@tampe125 This isn't my code, but it looks like it works.

  <?php  /** * close all open xhtml tags at the end of the string

 * * @param string $html

 * @return string

 * @author Milian <[e-mail]>

 */function closetags($html) {

  #put all opened tags into an array

  preg_match_all('#<([a-z]+)(?: .*)?(?<![/|/ ])>#iU', $html, $result);

  $openedtags = $result[1];   #put all closed tags into an array

  preg_match_all('#</([a-z]+)>#iU', $html, $result);

  $closedtags = $result[1];

  $len_opened = count($openedtags);

  # all tags are closed

  if (count($closedtags) == $len_opened) {

    return $html;

  }

  $openedtags = array_reverse($openedtags);

  # close tags

  for ($i=0; $i < $len_opened; $i++) {

    if (!in_array($openedtags[$i], $closedtags)){

      $html .= '</'.$openedtags[$i].'>';

    } else {

      unset($closedtags[array_search($openedtags[$i], $closedtags)]);    }

  }  return $html;}  ?>

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