问题描述
我一直将||(双管道)用于if (($a == $b) || ($a == $c)) { }，将or用于do_this() or do_that();.
I've always used || (double pipe) for if (($a == $b) || ($a == $c)) { } and or for do_this() or do_that();.
为什么不是if (($a == $b) or ($a == $c)) { }或do_this() || do_that();?
使用这两个逻辑运算符中的任何一个是有原因的吗?还是仅出于个人喜好?
Is there a reason to use any of these two logical operators or it is just a personal preference?
&&与and的情况相同，我仅使用&&.
The same applies for && vs. and, of which I only use &&.
推荐答案
拼写"运算符and和or的优先级较低，甚至低于赋值，因此您可以使用它们来避免写括号在很多地方例如:
The "spelled out" operators and and or have lower precedence, even lower than assignment, so you may use them to avoid having to write parentheses in so many places. For example:
$d=$a||$b and $c等同于($d=$a||$b) && $c
它们在许多情况下也更具可读性.
They are also more readable in many contexts.
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