在关联数组中查找最小值的键

问题描述

在PHP中，说您有一个像这样的关联数组:

In PHP, say that you have an associative array like this:

$pets = array(
    "cats" => 1,
    "dogs" => 2,
    "fish" => 3
);

如何找到具有最低值的密钥?在这里，我要寻找cats.

我错过了一些内置的PHP函数吗?如果有一个解决方案可以说明几个相同的值，那也很好，如下:

Is there some built in PHP function that I've missed which does this? It would also be great if there was a solution that accounted for several values being identical, as below:

$pets = array(
    "cats" => 1,
    "dogs" => 1,
    "fish" => 2
);

上面，我不介意它是否只是输出； cats或dogs.

Above, I wouldn't mind if it just output either; cats or dogs.

谢谢.

推荐答案

array_keys 是您的朋友:

array_keys is your friend:

$pets = array(
    "cats" => 1,
    "dogs" => 2,
    "fish" => 3
);
array_keys($pets, min($pets));  # array('cats')

P.S.:在SO的某处有一个dup(它是max而不是min，但我可以清楚地记住它).

P.S.: there is a dup here somewhere on SO (it had max instead of min, but I can distinctly remember it).

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