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About $ url = $ _ SERVER ["REQUEST_URI "]

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About the $ url =$ _ SERVER [& quot; REQUEST_URI & quot;] problem a few days ago $ url = $ _ SERVER [& quot; REQUEST_URI & quot;]; the url value can also be returned normally, for example (about. php? Cid = 44) you can obtain all the information about $ url = $ _ SERVER ["REQUEST_URI"] today.
A few days ago, $ url = $ _ SERVER ["REQUEST_URI"]; the url value can also be normally returned, for example (about. php? Cid = 44) can be obtained all
The found value is null today. why? I configured it in php. ini? My IIS + php5.16


------ Solution --------------------
It is related to the server. iis cannot be obtained. apache can get it...
------ Solution --------------------
Var_dump ($ _ SERVER) is printed, you will know

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