How to use php rsort function

php The rsort function is used to sort a numerical array in descending order. Its syntax is rsort(array, sortingtype). Please use the sort() function to sort a numerical array in ascending order.

#php How to use rsort function?

Definition and usage

rsort() function sorts a numeric array in descending order.

Tip: Please use the sort() function to sort the numeric array in ascending order.

Syntax

rsort(array,sortingtype);

Parameters

array Required, specifies the array to be sorted.

sortingtype is optional and specifies how to compare elements/items of the array. 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

rsort() function sorts the elements of the array in reverse order by key value. Basically the same function as arsort().

Note: This function assigns a new key name to the unit in array. This will delete the original keys rather than just reorder them.

Returns TRUE if successful, otherwise returns FALSE.

The optional second parameter contains additional sorting flags.

Return value: TRUE on success. FALSE on failure

PHP version: 4

Example 1

Pair array $numbers Sort the elements in numerically in descending order:

<?php
$numbers=array(4,6,2,22,11);
rsort($numbers);
?>

Output:

22
11
6
4
2

Example 2

Compare the items as numbers and compare the array$ Sort the elements in cars in descending order:

<?php
$cars=array("Volvo","BMW","Toyota");
rsort($cars,SORT_NUMERIC);
?>

Output:

Volvo
BMW
Toyota

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