在PHP中堆叠多个三元运算符

问题描述

这是我写的:

 $Myprovince = (
($province == 6) ? "city-1" :
($province == 7) ? "city-2" :
($province == 8) ? "city-3" :
($province == 30) ? "city-4" : "out of borders"
);

但是对于每个字段，我都得到值city-4.我想使用三元运算符代替switch/if，因为我想尝试一下，看看它会如何实现.

But for every field I got the value city-4. I want to use ternary operators instead of switch/if because I want to experiment and see how it would be done.

此代码有什么问题?

推荐答案

其他人已经提出了正确的方法，但是如果您真的想使用三元运算符，则需要使用括号:

Others have already suggested the right way of doing it but if you really want to use ternary operator you need to use parenthesis as:

$province = 7;
 $Myprovince = (
 ($province == 6) ? "city-1" :
  (($province == 7) ? "city-2" :
   (($province == 8) ? "city-3" :
    (($province == 30) ? "city-4" : "out of borders")))
 );

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