PHP: rsort() function

Last update on August 19 2022 21:50:39 (UTC/GMT +8 hours)

PHP: Sort an array in reverse order

This rsort() function is used to sort an array in reverse order (highest to lowest).

Note: If two members compare as equal, their relative order in the sorted array is undefined.

Version:

(PHP 4 and above)

Syntax:

rsort(array1, sort_flags )

Parameters:

Name	Description	Required / Optional	Type
array1	The input array to sort.	Required	Array
sort_flags	Sets the sorting behavior. Possible Sorting type flags. SORT_REGULAR - Compare items normally. SORT_NUMERIC - Compare items. numerically SORT_STRING - Compare items as strings. SORT_LOCALE_STRING - compare items as strings, based on the current locale.	Optional	Integer

Return value:

TRUE on success or FALSE on failure.

Value Type: Boolean.

Example:

<?php
$subject = array("Language", "English", "Math", "History");
rsort($subject);
foreach ($subject as $key => $val)
{
echo "subject[ " . $key . "] = " . $val . "<br />";
}
?>

Output:

subject[ 0] = Math
subject[ 1] = Language
subject[ 2] = History
subject[ 3] = English

Pictorial Presentation:

php function reference: rsort() function

View the example in the browser

Practice here online :

See also

PHP Function Reference

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