Get the nth key from an array.
Can use negative indices to work backwards from the end.
array_key_at(array $array, int $index): mixedarray
The input array
index
The index to read from. 0 for the first, 1 for the second etc.
This also allows for -1 for the last.
Returns the key at the index if found.
Example # 1 Example uses of array_key_at()
$array = ['a' => 1, 'b' => 2, 'c' => 3, 'd' => 4];
echo array_key_at($array, 0);
echo array_key_at($array, 2);The above example will output:
a
c
Example # 2 Example uses of array_key_at() with a negative index
$array = ['a' => 1, 'b' => 2, 'c' => 3, 'd' => 4];
echo array_key_at($array, -1);
echo array_key_at($array, -2);The above example will output:
d
c