php if语句忽略条件

Question

我正在尝试检查用户是否来自某些国家而不是来自ip地址,而不是输入如果以下语句检查$COUNTRY但是忽略了ip检查条件

if($COUNTRY == "USA" || $COUNTRY == "CAN" && $ipc != "1x.1x.1x.1x" && $ipc != "2x.2x.2x.2x"){

Answer 1

你知道优先权吗？

if(($COUNTRY == "USA" || $COUNTRY == "CAN") && $ipc != "1x.1x.1x.1x" && $ipc != "2x.2x.2x.2x"){

Answer 2

if(($COUNTRY == "USA" || $COUNTRY == "CAN") && $ipc != "1x.1x.1x.1x" && $ipc != "2x.2x.2x.2x")

您希望( )在||条件周围使用,以便PHP正确评估它

这就像数学一样,使用操作顺序.