js cookie 实现您最近浏览过内容

$cookvalue = isset( $_COOKIE['lpid'] )?$_COOKIE['lpid']:NULL;
if( !empty( $cookvalue ) && $cookvalue != NULL )
{
 $c_array = explode(",",$cookvalue ); 
 $c_array = array_flip(array_flip($c_array));
 $ids = implode(',',$c_array);
 echo $ids ; //结果为 1,2,3 这类 
  
}
?>