How to strip HTML tags, scripts, and styles from a web page using PHP

smallwei 4:57 am on October 26, 2009 | Answers: 1    
Tags: analysis tool, html (10), html tags (3), php (40), php search engine, search engine keyword, strip tags, text (65), web (25)

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• smallwei 5:01 am on October 26, 2009
  

  Use the following php function to do the job:

  function strip_html_tags( $text )
  {
    // PHP's strip_tags() function will remove tags, but it
    // doesn't remove scripts, styles, and other unwanted
    // invisible text between tags.  Also, as a prelude to
    // tokenizing the text, we need to insure that when
    // block-level tags (such as <p> or <div>) are removed,
    // neighboring words aren't joined.
    $text = preg_replace(
      array(
        // Remove invisible content
        '@<head[^>]*?>.*?</head>@siu',
        '@<style[^>]*?>.*?</style>@siu',
        '@<script[^>]*?.*?</script>@siu',
        '@<object[^>]*?.*?</object>@siu',
        '@<embed[^>]*?.*?</embed>@siu',
        '@<applet[^>]*?.*?</applet>@siu',
        '@<noframes[^>]*?.*?</noframes>@siu',
        '@<noscript[^>]*?.*?</noscript>@siu',
        '@<noembed[^>]*?.*?</noembed>@siu',
  
        // Add line breaks before & after blocks
        '@<((br)|(hr))@iu',
        '@</?((address)|(blockquote)|(center)|(del))@iu',
        '@</?((div)|(h[1-9])|(ins)|(isindex)|(p)|(pre))@iu',
        '@</?((dir)|(dl)|(dt)|(dd)|(li)|(menu)|(ol)|(ul))@iu',
        '@</?((table)|(th)|(td)|(caption))@iu',
        '@</?((form)|(button)|(fieldset)|(legend)|(input))@iu',
        '@</?((label)|(select)|(optgroup)|(option)|(textarea))@iu',
        '@</?((frameset)|(frame)|(iframe))@iu',
      ),
      array(
        ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ',
        "\n\$0", "\n\$0", "\n\$0", "\n\$0", "\n\$0", "\n\$0",
        "\n\$0", "\n\$0",
      ),
      $text );
  
    // Remove all remaining tags and comments and return.
    return strip_tags( $text );
  }
  

  Source: nadeausoftware