Reverse PHP array and keep keys and values

PHP Array reverse method to preserve keys and values: (1) Use array_reverse() to reverse the array and preserve keys.

Reverse PHP array: keep keys and values

Prerequisites:

• Have basic knowledge PHP Knowledge

Code Example:

There are various ways to reverse a PHP array while preserving the keys and values. The following is one of the most commonly used methods:

<?php

$originalArray = [
    'foo' => 'bar',
    'baz' => 'qux',
    'corge' => 'grault'
];

// 使用 array_reverse() 反转数组
$reversedArray = array_reverse($originalArray, true);

// 输出反转后的数组
var_dump($reversedArray);

?>

Output:

array(3) {
  ["corge"]=>
  string(6) "grault"
  ["baz"]=>
  string(3) "qux"
  ["foo"]=>
  string(3) "bar"
}

Practical example:

Suppose you have a An array containing information about users that you want to display in reverse order. You can use array_reverse() to achieve this conveniently:

<?php

$users = [
    ['id' => 1, 'name' => 'John Doe'],
    ['id' => 2, 'name' => 'Jane Smith'],
    ['id' => 3, 'name' => 'Johnathon Doe']
];

// 反转数组
$reversedUsers = array_reverse($users, true);

// 循环输出反转后的用户
foreach ($reversedUsers as $user) {
    echo "ID: {$user['id']} - Name: {$user['name']}" . PHP_EOL;
}

?>

Output:

ID: 3 - Name: Johnathon Doe
ID: 2 - Name: Jane Smith
ID: 1 - Name: John Doe

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