php-是否可以计算数组中键的数量? [英] php - Is it possible to count the number of keys in an array?

问题描述

我已经用谷歌搜索了，但是没有找到答案，所以我猜不可能.如果有办法，我很想知道.谢谢

I've googled this but found no answers, so I guess it's not possible. If there is a way, I'd love to know it. Thanks

推荐答案

数组中键的数量始终是数组中元素的数量，因为键必须是唯一的.所以:

The number of keys in the array will always be the number of elements in the array, as the keys must be unique. So:

$numKeys = count($array);

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