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Home Backend Development PHP Tutorial php 在使用if判断的时候 如果是多个逻辑或(||)条件 有没有简写的方法

php 在使用if判断的时候 如果是多个逻辑或(||)条件 有没有简写的方法

Jun 06, 2016 pm 08:39 PM
php

比如

<code> $order['status'] == 9 || $order['status'] == 10 || $order['status'] == 11
</code>
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Copy after login

类似这种的话,如果两三个还勉强可以接受,但是如果还有 3 个以上的条件我就无法接受这种写法了。
后来使用了 in_array()的方法相对简短一点了。

想来请教下 php 中 有没有比 in_array()再好点的写法了。谢谢

回复内容:

比如

<code> $order['status'] == 9 || $order['status'] == 10 || $order['status'] == 11
</code>
Copy after login
Copy after login

类似这种的话,如果两三个还勉强可以接受,但是如果还有 3 个以上的条件我就无法接受这种写法了。
后来使用了 in_array()的方法相对简短一点了。

想来请教下 php 中 有没有比 in_array()再好点的写法了。谢谢

酱?

<code>php</code><code>switch($order['status']){
    case FINISHED:
    case PENDING:
    case PROCESSING:
        //logic
        break;
    default:
        break;
}
</code>
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难道不是 in_array($order['status'], [9, 10, 11])

像你这个例子, 改成switch就行了,简单直观还合理;

如果条件太多无可避免的情况,即只能用if,就算用别的也感觉别扭不对劲的时候, 建议换一种写法:

<code>if ($order['status'] == 9 
    || $order['status'] == 10 
    || $order['status'] == 11) {

}
</code>
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我是花括号部另起一行党, 但在这种情况下,也可以

<code>if ($order['status'] == 9 
    || $order['status'] == 10 
    || $order['status'] == 11) 
{

}
</code>
Copy after login

另外建议把字面量常量放在左边。

如果if里的判断条件特别特别长(我见过有些分支需要判断三四个变量,||和&&用了七八个),建议把判断条件写成单独的函数

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