也可以尝试检查php.ini中的“
request_order”选项：
; This directive determines which super global data (G,P,C,E & S) should; be registered into the super global array REQUEST. If so, it also determines; the order in which that data is registered. The values for this directive are; specified in the same manner as the variables_order directive, EXCEPT one.; Leaving this value empty will cause PHP to use the value set in the; variables_order directive. It does not mean it will leave the super globals; array REQUEST empty.; Default Value: None; Development Value: "GP"; Production Value: "GP"; http://php.net/request-orderrequest_order = "GP"
