简化操作，例如:if($ variable == 1 || $ variable ==“随便什么" || $ variable =='492'). [英] Short hand to do something like: if($variable == 1 || $variable == "whatever" || $variable == '492') .

问题描述

我发现自己正在执行这种类型的IF语句分配.例如:

I find my self doing this type of IF statement allot. For example:

if($variable == 1 || $variable == "whatever" || $variable == '492') { ... }  

除了时间分配外，我将$ variable与4-5件事进行比较，有时还会更多.有写这个的简便方法吗?您会看到重复$variable ==将变得多余.

Except for allot of the time, I am comparing the $variable to maybe 4-5 things, sometimes more. Is there a short hand way to write this? You can see that repeating $variable == would get redundant.

我希望它能正常工作，但事实并非如此:

I would love for this to work, but it doesn't:

if($variable == (1 || "whatever" || 492) { ... }

推荐答案

您可以使用此速记形式，但请记住，使用or子句显式列出它们全部的效率较低:

You can use this shorthand, but keep in mind that it is less efficient that explicitly listing them all with or clauses:

if(in_array($variable, array(1, 'whatever', '492'))){ ... }

此外，如果要使用===而不是==，则等效项是:

Also if you want to use === instead of == the equivalent is:

if(in_array($variable, array(1, 'whatever', '492'), TRUE)){ ... }

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