当你使用Microsoft Word会创建许多Tag，比如font，span，style，class等。这些标签对于Word本身而言是非常有用的，但是当你从Word粘贴至网页时，你会发现很多无用的Tag。因此，下面的这段代码可帮助你删除所有无用的Word HTML Tag。 
PHP 代码：【复制】 
function cleanHTML($html) {
    /// <summary>
    /// Removes all FONT and SPAN tags, and all Class and Style attributes.
    /// Designed to get rid of non-standard Microsoft Word HTML tags.
    /// </summary>
    // start by completely removing all unwanted tags
    $html = ereg_replace("<(/)?(font|span|del|ins)[^>]*>", "", $html);

    // then run another pass over the html (twice), removing unwanted attributes
    $html = ereg_replace("<([^>]*)(class|lang|style|size|face)=(" [ ^ "]*" | '[^'] * '|[^>]+)([^>]*)>","<\1>",$html);
$html = ereg_replace("<([^>]*)(class|lang|style|size|face)=("[^"]*"|' [ ^ ']*' | [ ^ >] + )([ ^ >] * ) > "," < \1 > ",$html);

return $html
}