📅  最后修改于: 2022-03-11 14:53:49.825000             🧑  作者: Mango
//(PHP 7 >= 7.3.0)
$key = array_key_last($data);
//ALL PHP Versions
end($data); // move the internal pointer to the end of the array
$key = key($data); // fetches the key of the element pointed to by the internal pointer