动态输入中的PHP数组交换

<?php
// 顺序交换
$array = [1, 2, 3, 4, 5];
$reversedArray = array_reverse($array);
print_r($reversedArray); // 输出: Array ( [0] => 5 [1] => 4 [2] => 3 [3] => 2 [4] => 1 )

// 位置交换
$array = [1, 2, 3, 4, 5];
$temp = $array[0];
$array[0] = $array[4];
$array[4] = $temp;
print_r($array); // 输出: Array ( [0] => 5 [1] => 2 [2] => 3 [3] => 4 [4] => 1 )

// 数组间交换
$array1 = [1, 2, 3];
$array2 = [4, 5, 6];
$array1 = array_merge($array2, $array1);
print_r($array1); // 输出: Array ( [0] => 4 [1] => 5 [2] => 6 [3] => 1 [4] => 2 [5] => 3 )
?>

$temp = $array[0];
$array[0] = $array[4];
$array[4] = $temp;

// 使用加法和减法
$a = $a + $b;
$b = $a - $b;
$a = $a - $b;

// 使用异或运算
$a = $a ^ $b;
$b = $a ^ $b;
$a = $a ^ $b;