array_reverse

PHP array_reverse()函数 (PHP array_reverse() function)

array_reverse() function is used to returns an array in reverse order, it accepts an array and returns a new array with values in reverse order.

array_reverse()函数用于以相反的顺序返回数组，它接受一个数组并以相反的顺序返回带有值的新数组。

Syntax:

句法：

    array_reverse(array, [preserve]);

Here,

这里，

• array is an array.

  数组是一个数组。

• preserve is an optional parameter and its default value is false, it is used to define whether we want to preserve the keys or not. If it sets to true – keys will also be reversed.

  keep是一个可选参数，其默认值为false ，它用于定义我们是否要保留键。 如果设置为true –按键也将反转。

Examples:

例子：

    Input:
$arr1 = array(10, 20, 30, 40, 50);
Output:
Array
(
[0] => 50
[1] => 40
[2] => 30
[3] => 20
[4] => 10
)

PHP code 1:

PHP代码1：

<?php
$arr1 = array(10, 20, 30, 40, 50);
$arr2 = array("name" => "Amit", "age" => 21, "gender" => "Male");
//printing array in reverse order
print_r (array_reverse($arr1));
print_r (array_reverse($arr2));
?>

Output

输出量

Array
(
[0] => 50
[1] => 40
[2] => 30
[3] => 20
[4] => 10
)
Array
(
[gender] => Male
[age] => 21
[name] => Amit
)

PHP code 2:

PHP代码2：

<?php
$arr = array(10, 20, 30, 40, 50);
//printing array in reverse order
print_r (array_reverse($arr));
print_r (array_reverse($arr, true));
?>

Output

输出量

Array
(
[0] => 50
[1] => 40
[2] => 30
[3] => 20
[4] => 10
)
Array
(
[4] => 50
[3] => 40
[2] => 30
[1] => 20
[0] => 10
)

翻译自: https://www.includehelp.com/php/array_reverse-function-with-example.aspx

array_reverse