PHP array_arsort( ) function

The array_arsort( ) function is an inbuilt function of PHP. The array_arsort( ) function is used to sort an array in reverse order and the function maintains index association. This function was introduced in 4.0.

Syntax

Parameters

Parameter	Description	Is compulsory
array	Specifies the name of the array to sort.	compulsory
Sort_flags	Specifies how to compare the array elements.	Optional

Return Values

The array_arsort( ) function returns true on success and false on failure.

Example 1

<?php
$city = array("Bengaluru","noida","hyderabad");
arsort($city);
print_r($city);
?>

Output:

Array
(
    [1] =>noida
    [2] =>hyderabad
    [0] => Bengaluru
)

Example 2

<?php
$subject = array("OS"=> 95, "compiler"=> 68, "data structure"=> 89);
arsort($subject);
print_r($subject);
?>

Output:

Array
(
    [OS] => 95
    [data structure] => 89
    [compiler] => 68
)

Example 3

<?php
$age=array("sachin"=>"45","ganguly"=>"46","virat"=>"29");
arsort($age);
print_r($age);
?>

Output:

Array
(
    [ganguly] => 46
    [sachin] => 45
    [virat] => 29
)

Example 4

<?php
$river = array("a" => "ganga", "b" => "narmada", "c" => "yamuna");
arsort($river);
print_r($river);
?>

Output:

Array
(
    [c] =>yamuna
    [b] =>narmada
    [a] => ganga
)

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