php 检查键是否是数组中的最后一个元素？

Checking if a key is the last element in an array?

提问by tarnfeld

How can I check if this key is the last element in an array?

如何检查此键是否是数组中的最后一个元素？

$array = array("a","b","c");

The value "c" would have the key 2. Is there some code like this is_end(2)which returns true or false depending if they key is the last of the array? Is there some kind of while()statement I can use?

值“c”的键为 2。是否有类似这样的代码is_end(2)返回 true 或 false，具体取决于它们的键是否是数组的最后一个？有while()什么我可以使用的声明吗？

回答by Yacoby

You could use end()and key()to get the key at the end of the array.

您可以使用end()和key()来获取数组末尾的键。

end($array);
$lastKey = key($array);

回答by Felix Kling

You can countthe array values:

您可以count使用数组值：

$last_index = count($array) - 1;

But this won't work with associative arrays.

但这不适用于关联数组。

回答by useless

$is_2_lastone = array_pop(array_keys($array)) === 2;

回答by Marius

Assuming you don't use an associative array, you could just check the length of the array, using count. It will return 1+last index in array

假设您不使用关联数组，您可以使用count检查数组的长度。它会回来1+last index in array