About the application of knowledge related to PHP array sorting

PHP Array sorting plays an important role in PHP. This article provides a detailed explanation of it.

PHP - Array sorting function

In this chapter, we will introduce the following PHP array sorting functions one by one:

sort() - Sort the array in ascending order

rsort() - Sort the array in descending order

asort() - Sort the array in ascending order based on the values ​​of the associative array

ksort() - Sort the array in ascending order based on the keys of the associative array Sort the array in ascending order

arsort() - Sort the array in descending order based on the values ​​of the associative array

krsort() - Sort the array in descending order based on the keys of the associative array Descending order

sort() - Sort the array in ascending order

The following example sorts the elements in the $cars array in ascending alphabetical order:

Example

<?php
$cars=array("Volvo","BMW","Toyota");
sort($cars);
?>

The following example sorts the elements in the $numbers array in ascending numerical order:

Example

<?php
$numbers=array(4,6,2,22,11);
sort($numbers);
?>

rsort() - Sorts the array in descending order

The following example will The elements in the $cars array are sorted in descending alphabetical order:

Example

<?php
$cars=array("Volvo","BMW","Toyota");
rsort($cars);
?>

The following example sorts the elements in the $numbers array in descending numerical order:

Example

<?php
$numbers=array(4,6,2,22,11);
rsort($numbers);
?>

asort() - Sort the array in ascending order according to the value of the array

The following example sorts the associative array in ascending order according to the value of the array:

Example

<?php
$age=array("Peter"=>"35","Ben"=>"37","Joe"=>"43");
asort($age);
?>

ksort() - Sort the array in ascending order according to the key of the array

The following example sorts the associative array in ascending order according to the key of the array:

Example

$age=array("Peter"=>"35","Ben"=>"37","Joe"=>"43");
ksort($ age);
?>

arsort() - Sort the array in descending order according to the value of the array

The following example sorts the associative array in descending order according to the value of the array:

Example

<?php
$age=array("Peter"=>"35","Ben"=>"37","Joe"=>"43");
arsort($age);
?>

krsort() - Sort the array in descending order according to the key of the array

The following example sorts the associative array in descending order according to the key of the array:

Example

<?php
$age=array("Peter"=>"35","Ben"=>"37","Joe"=>"43");
krsort($age);
?>

This article provides a detailed explanation of php array sorting. For more learning materials, please pay attention to the php Chinese website.

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