Sorting Arrays in PHP

The following function are used for sorting arrays.

• sort()
• rsort()
• asort()
• ksort()
• arsort()
• krsort()

sort() function : The sort() function is used for sorting the value of the indexed array in ascending order.

Example :

<?php
// Define array
$numbers = array(6,2,9,4,5);
// Sorting and printing array
sort($numbers);
print_r($numbers);
?>

Output :

Array ( [0] => 2 [1] => 4 [2] => 5 [3] => 6 [4] => 9 )

rsort() function : The rsort() function is used for sorting the value of the indexed array in descending order.

Example :

<?php
// Define array
$numbers = array(6,2,9,4,5);
// Sorting and printing array
rsort($numbers);
print_r($numbers);
?>

Output :

Array ( [0] => 9 [1] => 6 [2] => 5 [3] => 4 [4] => 2 )

asort() function : The asort() function sorts the elements of an associative array in ascending order according to the value.

Example :

<?php
$age = array("Alokesh"=>"23","Rinku"=>"22","Tapan"=>"24");
asort($age);
print_r($age);
?>

Output :

Array ( [Rinku] => 22 [Alokesh] => 23 [Tapan] => 24 )

ksort() function : The ksort() function sorts the elements of an associative array in ascending order by their keys.

Example :

<?php
$age = array("Alokesh"=>"23","Rinku"=>"22","Tapan"=>"24");
ksort($age);
print_r($age);
?>

Output :

Array ( [Alokesh] => 23 [Rinku] => 22 [Tapan] => 24 )

arsort() function :  The arsort() function sorts the elements of an associative array in descending order according to the value.

Example :

<?php
$age = array("Alokesh"=>"23","Rinku"=>"22","Tapan"=>"24");
arsort($age);
print_r($age);
?>

Output :

Array ( [Tapan] => 24 [Alokesh] => 23 [Rinku] => 22 )

krsort() function :  The krsort() function sorts the elements of an associative array in descending order by their keys.

Example :

<?php
$age = array("Alokesh"=>"23","Rinku"=>"22","Tapan"=>"24");
krsort($age);
print_r($age);
?>

Output :

Array ( [Tapan] => 24 [Rinku] => 22 [Alokesh] => 23 )