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PHP Basic

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PHP Data Types

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PHP Advanced

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PHP Reference

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Text lesson

krsort()

Example

Sort an associative array in descending order based on the key.

<?php
$age=array(“Peter”=>“35”,“Ben”=>“37”,“Joe”=>“43”);
krsort($age);
?>

Definition and Usage

The krsort() function sorts an associative array in descending order based on the key.

Tip: Use the ksort() function to sort an associative array in ascending order by key.

Tip: Use the arsort() function to sort an associative array in descending order by value.

Syntax

krsort(array, sorttype)

Parameter Values

Parameter

Description

array

Required. Specifies the array to be sorted

sorttype

Optional. Specifies how to compare the array elements/items. Possible values are:

0 = SORT_REGULAR – Default. Compares items normally (without changing types)
1 = SORT_NUMERIC – Compares items numerically
2 = SORT_STRING – Compares items as strings
3 = SORT_LOCALE_STRING – Compares items as strings based on the current locale
4 = SORT_NATURAL – Compares items as strings using natural ordering
5 = SORT_FLAG_CASE – Compares items with case-insensitive sorting

Technical Details

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