PHP krsort() Function

PHP Array Functions

Example

Sort an associative array in descending order by key name:

<?php
$age=array("Bill"=>"60","Steve"=>"56","mark"=>"31");
krsort($age);
?>

Running Instance

Definition and Usage

The krsort() function sorts an associative array in descending order by key name.

Tip:Please use ksort() The function sorts an associative array in ascending order by key name.

Tip:Please use arsort() The function sorts an associative array in descending order by key value.

Syntax

krsort(array,sortingtype);
Parameters Description
array Required. Specifies the array to be sorted.
sortingtype

Optional. Specifies how to sort the elements/items of the array. Possible values:

  • 0 = SORT_REGULAR - Default. Sort each item in regular order (Standard ASCII, does not change type).
  • 1 = SORT_NUMERIC - Treat each item as a number.
  • 2 = SORT_STRING - Treat each item as a string.
  • 3 = SORT_LOCALE_STRING - Treat each item as a string, based on the current locale setting (can be changed by setlocale()).
  • 4 = SORT_NATURAL - Treat each item as a string, using a natural sorting similar to natsort().
  • 5 = SORT_FLAG_CASE - Can be combined (bitwise OR) with SORT_STRING or SORT_NATURAL to sort strings without case sensitivity.

Description

The krsort() function sorts an array in reverse order by key, keeping the original keys for the array values.

The optional second parameter includes additional sorting flags.

Returns TRUE if successful, FALSE otherwise.

Technical Details

Return Value: Returns TRUE on success, FALSE on failure.
PHP Version: 4+

PHP Array Functions