PHP Sorting Arrays
Sort Functions For Arrays
The elements in an array can be sorted in alphabetical or numerical order, descending or ascending.
- sort( ) - sort arrays in ascending order
- rsort( ) - sort arrays in descending order
- asort( ) - sort associative arrays in ascending order, according to the value
- ksort( ) - sort associative arrays in ascending order, according to the key
- arsort( ) - sort associative arrays in descending order, according to the value
- krsort( ) - sort associative arrays in descending order, according to the key
Sort Array in Ascending Order - sort( )
The following example sorts the elements of the $cars array in ascending alphabetical order:
Note that while creating a function its name should start with keyword function and all the PHP code should be put inside { and } braces as shown in the following example below:
<?php
$cars = array("Volvo", "BMW", "Toyota");
sort($cars);
?>
The following example sorts the elements of the $numbers array in ascending numerical order:.
<?php
$numbers = array(4, 6, 2, 22, 11);
sort($numbers);
?>
Sort Array in Descending Order - rsort( )
The following example sorts the elements of the $cars array in descending alphabetical order:
<?php
$cars = array("Volvo", "BMW", "Toyota");
rsort($cars);
?>
The following example sorts the elements of the $numbers array in descending numerical order:
<?php
$numbers = array(4, 6, 2, 22, 11);
rsort($numbers);
?>
Sort Array (Ascending Order), According to Value - asort( )
The following example sorts an associative array in ascending order, according to the key:
<?php
$age = array("Peter"=>"35", "Ben"=>"37", "Joe"=>"43");
ksort($age);
?>
Sort Array (Descending Order), According to Value - arsort( )
The following example sorts an associative array in descending order, according to the value:
<?php
$age = array("Peter"=>"35", "Ben"=>"37", "Joe"=>"43");
arsort($age);
?>
Sort Array (Descending Order), According to Key - krsort( )
The following example sorts an associative array in descending order, according to the key:
<?php
$age = array("Peter"=>"35", "Ben"=>"37", "Joe"=>"43");
krsort($age);
?>
