//是否是AJAX提交
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
function isGet(){
return $_SERVER['REQUEST_METHOD'] == 'GET' ? true : false;
}




//是否是POST提交
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;
}