How to use php arsort function

php The arsort function is used to sort associative arrays in descending order by key value. Its syntax is arsort(array, sortingtype). The parameter array is required and refers to the array to be sorted.

#How to use php arsort function?

Definition and usage

The arsort() function sorts the associative array in descending order by key value.

Tip: Please use the asort() function to sort the associative array in ascending order by key value.

Tip: Please use the krsort() function to sort the associative array in descending order by key name.

Syntax

arsort(array,sortingtype);

Parameters

array required. Specifies the array to be sorted.

sortingtype is optional. Specifies how the elements/items of an array are arranged. Possible values:

0 = SORT_REGULAR - Default. Put each item in regular order (Standard ASCII, no change of 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 (can be changed via setlocale()).

4 = SORT_NATURAL - Treat each item as a string, using natural sorting like natsort().

5 = SORT_FLAG_CASE - Strings can be sorted in combination (bitwise OR) with SORT_STRING or SORT_NATURAL, case-insensitively.

Description

The arsort() function sorts the array in reverse order and maintains the index relationship. Mainly used for sorting associative arrays where the order of cells is important.

The optional second parameter contains additional sorting identifiers.

Returns TRUE if successful, otherwise returns FALSE.

Return value: TRUE if successful, FALSE if failed.

PHP Version: 4

Example

Sort the associative array in descending order by key value:

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

Output:

Key=Bill, Value=60
Key=Steve, Value=56
Key=Mark, Value=31

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