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PHP 5 Sorting Arrays

PHP Programming Sunday June 18th, 2017
779 Görüntülenme

The elements in an array can be sorted in alphabetical or numerical order, descending or ascending.

In this chapter, we will go through the following PHP array sort functions:

  • 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:

<?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 value:

<?php
$age = array("Peter"=>"35", "Ben"=>"37", "Joe"=>"43");
asort($age);
?>
Sort Array (Ascending Order), According to Key – ksort()

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);
?>

Reference

  1. https://www.w3schools.com/php/php_arrays_sort.asp
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