php 过滤垃圾代码过滤脏字

/*
** 过滤一些脏词汇
** $words 脏词汇列表
** $replace 要替换成的词汇
** 返回替换完的词汇
*/
function replace_danger_word($content){
  $words=array(‘妈的‘,‘sb‘,‘我靠‘);
  $replace =‘*‘;
  foreach($words as $key=>$word){
   $content=str_replace($word,$replace,$content);
  }
  return $content;
}
/*
** 过滤一些js字符
** $string 要传入的字符
** 返回替换完的词汇
*/
function stripscript($string){
  $pregfind=array("/<script.*>.*<\/script>/siU",‘/on(mousewheel|mouseover|click|load|onload|submit|focus|blur)="[^"]*"/i‘);
  $pregreplace=array(‘‘,‘‘,);
  $string=preg_replace($pregfind,$pregreplace,$string);
  return $string;
 }