Sort an array by key in descending order

# krsort

(PHP 4, PHP 5, PHP 7, PHP 8)

krsort — Sort an array by key in descending order

### Description

krsort(array `&$array`, int `$flags` = `SORT_REGULAR`): true

Sorts `array` in place by keys in descending order.

> Note:

> If two members compare as equal, they retain their original order. Prior to PHP 8.0.0, their relative order in the sorted array was undefined.

> Note:

> Resets array's internal pointer to the first element.

### Parameters

`array`

  The input array.

`flags`

  The optional second parameter `flags` may be used to modify the sorting behavior using these values:

  Sorting type flags:

  - `SORT_REGULAR` - compare items normally; the details are described in the comparison operators section
  - `SORT_NUMERIC` - compare items numerically
  - `SORT_STRING` - compare items as strings
  - `SORT_LOCALE_STRING` - compare items as strings, based on the current locale. It uses the locale, which can be changed using setlocale()
  - `SORT_NATURAL` - compare items as strings using "natural ordering" like natsort()
  - `SORT_FLAG_CASE` - can be combined (bitwise OR) with `SORT_STRING` or `SORT_NATURAL` to sort strings case-insensitively

### Return Values

Always returns `true`.

### Changelog

Version | Description
--- | ---
8.2.0 | The return type is `true` now; previously, it was bool.
8.2.0 | This function now does numeric string comparison under `SORT_REGULAR` using the standard PHP 8 rules.

### Examples

Example #1 krsort() example

`<?php
$fruits = array("d"=>"lemon", "a"=>"orange", "b"=>"banana", "c"=>"apple");
krsort($fruits);
foreach ($fruits as $key => $val) {
echo "$key = $val\n";
}
?>`

The above example will output:

    d = lemon
    c = apple
    b = banana
    a = orange

### See Also

- sort() - Sort an array in ascending order
- ksort() - Sort an array by key in ascending order
- The comparison of array sorting functions

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