我在PHP中的數組，看起來像這樣：交換多維數組在PHP
$contacts = [
[
"name" => "Peter Parker",
"email" => "[email protected]",
], [
"name" => "Clark Kent",
"email" => "[email protected]",
], [
"name" => "Harry Potter",
"email" => "[email protected]"
]
];
我如何可以互換的最後一個元素和最後一個元素前的一個？
這應做到：
$length = count($contacts);
$last = $contacts[$length - 1];
$before_last = $contacts[$length - 2];
// swap
$contacts[$length - 2] = $last;
$contacts[$length - 1] = $before_last;
//
var_dump($contacts);
或者另一種方式：
$last = array_pop($contacts);
$before_last = array_pop($contacts);
// swap
array_push($contacts, $last);
array_push($contacts, $before_last);
//
var_dump($contacts);
或者另一種方式：
// cut last 2
$temp = array_splice($contacts, -2);
// swap
array_push($contacts, $temp[1]);
array_push($contacts, $temp[0]);
//
var_dump($contacts);