[PHP]代码

$referer = isset($_SERVER['HTTP_REFERER']) ? $_SERVER['HTTP_REFERER'] : NULL;  $host = $_SERVER['HTTP_HOST'];  echo '提交过来的地址：'.$referer;  echo '<br>';  echo '本站域名：'.$host;  echo '<br>';  echo substr($referer,7,strlen($host));  if(substr($referer,7,strlen($host)) != $host){   echo '非法操作';  }else{   echo '正常操作';  }