How to find the maximum and minimum values ​​of a one-dimensional array in PHP and exchange positions

In PHP, we can use built-in functions to find the maximum and minimum values ​​of a one-dimensional array, and they can be easily swapped. In this article, we will explain how to use PHP to achieve these operations.

Get the maximum and minimum values

To get the maximum and minimum values ​​of a one-dimensional array, we can use the PHP built-in functions max() and min (). These functions accept an array as a parameter and return the maximum and minimum values ​​in the array.

Here is an example:

$array = array(1, 2, 3, 4, 5);
$max = max($array);
$min = min($array);

echo "最大值：$max，最小值：$min";

The above code will output:

最大值：5，最小值：1

This is because $arrayThe maximum value in the array is 5, the minimum value is 1.

Exchanging the maximum and minimum values

To exchange the maximum and minimum values ​​in a one-dimensional array, we need to first find their indexes and then exchange their positions in the array. Here is a sample code to achieve this:

$array = array(1, 2, 3, 4, 5);
$max_index = array_search(max($array), $array);
$min_index = array_search(min($array), $array);

$temp = $array[$max_index];
$array[$max_index] = $array[$min_index];
$array[$min_index] = $temp;

print_r($array);

The above code will output:

Array
(
    [0] => 5
    [1] => 2
    [2] => 3
    [3] => 4
    [4] => 1
)

This is because we swap the positions of the maximum and minimum values ​​in the array, changing 5 and 1 are exchanged.

Summary

In PHP, we can use the built-in functions max() and min() to get the maximum sum of a one-dimensional array minimum value. To swap them, you can do it by swapping their positions in the array after getting their indexes. These operations are very simple and are built-in functions of PHP, so they are very convenient.

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