php 批量替换html标签的实例代码

  1.把html元素全部去掉,或者保留某几个html标签

  

复制代码 代码如下:

  <?php

  $text = '<p>Test paragraph.</p><!-- Comment --> <a href="#fragment">Other text</a>';

  echo strip_tags($text);

  echo "/n";

  // Allow <p> and <a>

  echo strip_tags($text, '<p><a>');

  ?>

  结果为(去掉了注释):

  <blockquote>Test paragraph. Other text

  <p>Test paragraph.</p> <a href="#fragment">Other text</a></blockquote>2.相反,只去掉某一个html标签

  

复制代码 代码如下:

  <?php

  function strip_only($str, $tags, $stripContent = false) {

  $content = '';

  if(!is_array($tags)) {

  $tags = (strpos($str, '>') !== false ? explode('>', str_replace('<', '', $tags)) : array($tags));

  if(end($tags) == '') array_pop($tags);

  }

  foreach($tags as $tag) {

  if ($stripContent)

  $content = '(.+</'.$tag.'[^>]*>|)';

  $str = preg_replace('#</?'.$tag.'[^>]*>'.$content.'#is', '', $str);

  }

  return $str;

  }

  $str = '<font color="red">red</font> text';

  $tags = 'font';

  $a = strip_only($str, $tags); // red text

  $b = strip_only($str, $tags, true); // text

  ?>