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PHP Basic

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PHP Install

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PHP Syntax

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PHP Comments

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PHP Variables

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PHP echo / print

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PHP Data Types

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PHP Strings

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PHP Numbers

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PHP Casting

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PHP Math

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PHP Functions

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PHP Arrays

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PHP Superglobals

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PHP RegEx

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PHP Form

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PHP Advanced

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PHP OOP

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MySQL Database

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PHP XML

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PHP Reference

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Text lesson

rsort()

Example

Sort the elements of the $cars array in reverse alphabetical order.

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

Definition and Usage

The rsort() function sorts an indexed array in descending order.

Tip: Use the sort() function to sort an indexed array in ascending order.

Syntax

rsort(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. Compare items normally (types are not changed)
1 = SORT_NUMERIC – Compare items numerically
2 = SORT_STRING – Compare items as strings
3 = SORT_LOCALE_STRING – Compare items as strings based on the current locale
4 = SORT_NATURAL – Compare items as strings using natural ordering
5 = SORT_FLAG_CASE – Compare items case-insensitively

Technical Details

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

More Examples

Example

Sort the elements of the $numbers array in descending numerical order.

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

Example

Compare the items numerically and sort the elements of the $cars array in descending order.

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