URI，QUERY_STRING 。。。

比如 请求： http://test.aidaojia.com/api/t.php?a=3&b=4]

[HTTP_HOST] => test.aidaojia.com

[SCRIPT_FILENAME] => /var/www/server_test/api/t.php

[SERVER_NAME] => test.aidaojia.com

[SERVER_ADDR] => 121.43.151.224

[REMOTE_ADDR] => 115.206.160.224

[DOCUMENT_URI] => /api/t.php

[REQUEST_URI] => /api/t.php?a=3&b=4]

[DOCUMENT_ROOT] => /usr/local/nginx/html

[SCRIPT_NAME] => /api/t.php

[QUERY_STRING] => a=3&b=4]

[PHP_SELF] => /api/t.php

[REQUEST_METHOD] => GET