php与http（php预定义变量）
var_dump($_SERVER['REQUEST_URI']);
var_dump($this->request->getRequestType());
var_dump($this->request->getIsAjaxRequest());
//打印信息
string(87) "/oms07/index.php?r=preShow/searchFails&idcName=JX&fromTime=2012-02-29&toTime=2012-02-29"
string(3) "GET"
bool(false)
PHP provides a large number of predefined variables to all scripts. The variables represent everything from external variables to built-in environment variables, last error messages to last retrieved headers.
Superglobals — Superglobals are built-in variables that are always available in all scopes
$GLOBALS — References all variables available in global scope
$_SERVER — Server and execution environment information
$_GET — HTTP GET variables
$_POST — HTTP POST variables
$_FILES — HTTP File Upload variables
$_REQUEST — HTTP Request variables
$_SESSION — Session variables
$_ENV — Environment variables
$_COOKIE — HTTP Cookies
$php_errormsg — The previous error message
$HTTP_RAW_POST_DATA — Raw POST data
$http_response_header — HTTP response headers
$argc — The number of arguments passed to script
$argv — Array of arguments passed to script
