url规则已定义：
RewriteRule ^/member/editprivilege/([0-9]+) /access.php?_u=mobile/editprivilege&aid=$1 [L]
使用$_GET获取不到id
url规则改为RewriteRule ^/member/editprivilege/([0-9]+) /access.php?_u=mobile/editprivilege&aid=$1 [L,QSA]即可获取