In php we have predefine function for sorting the array according to the need of the user. Functions are defined below.

sort() - It is used to sort arrays in ascending order

rsort() - It is used to sort arrays in descending order

asort() -It is used to sort associative arrays in ascending order, according to the value

ksort() -It is used to sort associative arrays in ascending order, according to the key

arsort() -It is used to sort associative arrays in descending order, according to the value

krsort() -It is used to sort associative arrays in descending order, according to the key

Example of sort() goes here:

<?php
$phone = array("Iphone", "Samsung", "Nokia");
sort($phone);
?>

Output for the above example is : Iphone Nokia Samsung. It will sort the array in the ascending order.

Example of rsort() goes here:

<?php
$phone = array("Iphone", "Samsung", "Nokia");
rsort($phone);
?>

Output for the above example is : Samsung Nokia Iphone. It will sort the array in the descending order.

Example of asort() goes here:

<?php
$weight = array("shubham"=>"80", "neeraj"=>"76", "mohit"=>"68");
asort($weight);
?>

Output for the above example is :

Key=mohit, value=68

Key=neeraj, value=76

Key=shubham,value=80
 It will sort the array in ascending order according to the value.

Example of ksort() goes here:

<?php
$weight = array("shubham"=>"80", "neeraj"=>"76", "mohit"=>"68");
asort($weight);
?>

Output for the above example is :

Key=shubham,value=80

Key=mohit, value=68

Key=neeraj, value=76

 It will sort the array in descending order according to the value.

Example of arsort() goes here:

<?php
$weight = array("shubham"=>"80", "neeraj"=>"76", "mohit"=>"68");
asort($weight);
?>

Output for the above example is :

Key=shubham,value=80

Key=mohit, value=68

Key=neeraj, value=76

 It will sort the associative array in descending order according to the value.

Example of  krsort() goes here:

<?php
$weight = array("shubham"=>"80", "neeraj"=>"76", "mohit"=>"68");
asort($weight);
?>

Output for the above example is :

Key=mohit, value=68

Key=neeraj, value=76

Key=shubham,value=80
 It will sort the associative array in ascending order according to the value.