/** * 是否是AJAx提交的 * @return bool */function isAjax(){  if(isset($_SERVER['HTTP_X_REQUESTED_WITH']) && strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest'){    return true;  }else{    return false;  }}/** * 是否是GET提交的 */function isGet(){  return $_SERVER['REQUEST_METHOD'] == 'GET' ? true : false;}/** * 是否是POST提交 * @return int */function isPost() {  return ($_SERVER['REQUEST_METHOD'] == 'POST' && checkurlHash($GLOBALS['verify']) && (empty($_SERVER['HTTP_REFERER']) || preg_replace("~https?:////([^/://]+).*~i", "//1", $_SERVER['HTTP_REFERER']) == preg_replace("~([^/:]+).*~", "//1", $_SERVER['HTTP_HOST']))) ? 1 : 0;}