如何从对应的数组值中获取数组键? [英] How to get array key from corresponding array value?

问题描述

您可以通过其键轻松获得数组值，如下所示:$value = array[$key]但是，如果我有该值并且想要它的键，该怎么办.最好的方法是什么?

You can easily get an array value by its key like so: $value = array[$key] but what if I have the value and I want its key. What's the best way to get it?

推荐答案

您可以使用

You could use array_search() to find the first matching key.

从手册中:

$array = array(0 => 'blue', 1 => 'red', 2 => 'green', 3 => 'red');

$key = array_search('green', $array); // $key = 2;
$key = array_search('red', $array);   // $key = 1;

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