php 去除html标签 js 和 css样式方法

function clearHtml($content){
 $content=preg_replace("/]*>/i","",$content);
 $content=preg_replace("//i","",$content);
 $content=preg_replace("/
]*>/i","",$content);
 $content=preg_replace("/
/i","",$content);
 $content=preg_replace("//i","",$content);//注释内容 
 $content=preg_replace("/style=.+?['|"]/i",'',$content);//去除样式 
 $content=preg_replace("/class=.+?['|"]/i",'',$content);//去除样式 
 $content=preg_replace("/id=.+?['|"]/i",'',$content);//去除样式 
 $content=preg_replace("/lang=.+?['|"]/i",'',$content);//去除样式 
 $content=preg_replace("/width=.+?['|"]/i",'',$content);//去除样式 
 $content=preg_replace("/height=.+?['|"]/i",'',$content);//去除样式 
 $content=preg_replace("/border=.+?['|"]/i",'',$content);//去除样式 
 $content=preg_replace("/face=.+?['|"]/i",'',$content);//去除样式 
 $content=preg_replace("/face=.+?['|"]/",'',$content);//去除样式 只允许小写 正则匹配没有带 i 参数 
 return $content;
}