PHP krsort() Function

In this chapter you will learn:

1. Definition for PHP krsort() Function
2. Syntax for PHP krsort() Function
3. Parameter for PHP krsort() Function
4. Note for PHP krsort() Function
5. Example - Sort an associative array in descending order, according to the key

Definition

The krsort() function takes an array and reverse sorts it by its keys while preserving the values.

This is the opposite of the ksort().

Syntax

PHP krsort() Function has the following syntax.

Parameter

Possible values for options:

Note

Use the ksort() function to sort an associative array in ascending order, according to the key.

Use the arsort() function to sort an associative array in descending order, according to the value.

<?PHP//  j a va2s .co  m
    $capitalcities['A'] = 'Z';
    $capitalcities['B'] = 'X';
    $capitalcities['C'] = 'Y';
    krsort($capitalcities);
    print_r($capitalcities);
?>

krsort() directly changes the value you pass in. The return value is either true or false, depending on whether the sorting was successful.

The code above generates the following result.

Example 2

Sort an associative array in descending order, according to the key:

<?php
$age=array("PHP"=>"5","Java"=>"7","java2s.com"=>"9");
krsort($age);
?>

The krsort() function sorts an associative array in descending order, according to the key.

Next chapter...

What you will learn in the next chapter:

1. Definition for PHP ksort() Function
2. Syntax for PHP ksort() Function
3. Parameter for PHP ksort() Function
4. Note for PHP ksort() Function
5. Example - Pass a second parameter to the sort functions to specify how you want the values sorted
6. Example - Sort an associative array in ascending order, according to the key

PHP array() function

PHP array_change_key_case() function

PHP array_chunk() function

PHP array_combine() function

PHP array_count_values() function

PHP array_diff() function

PHP array_diff_assoc() Function

PHP array_diff_key() function

PHP array_diff_uassoc() function

PHP array_diff_ukey() function

PHP array_fill() function

PHP array_fill_keys() function

PHP array_filter() function

PHP array_flip() function

PHP array_intersect() Function

PHP array_intersect_assoc() Function

PHP array_intersect_key() function

PHP array_intersect_uassoc() Function

PHP array_intersect_ukey() Function

PHP array_key_exists() Function

PHP array_keys() function

PHP array_map() Function

PHP array_merge() function

PHP array_merge_recursive() Function

PHP array_multisort() Function

PHP array_pad() Function

PHP array_pop() function

PHP array_product() Function

PHP array_push() function

PHP array_rand() function

PHP array_reduce() Function

PHP array_replace() Function

PHP array_replace_recursive() Function

PHP array_reverse() Function

PHP array_search() Function

PHP array_shift() Function

PHP array_slice() Function

PHP array_splice() Function

PHP array_sum() Function

PHP array_udiff() Function

PHP array_udiff_assoc() Function

PHP array_udiff_uassoc() Function

PHP array_uintersect() Function

PHP array_uintersect_assoc() Function

PHP array_uintersect_uassoc() Function

PHP array_unique() Function

PHP array_unshift() Function

PHP array_values() Function

PHP array_walk() Function

PHP array_walk_recursive() Function

PHP arsort() Function

PHP asort() Function

PHP compact() Function

PHP count() Function

PHP current() Function

PHP each() Function

PHP end() Function

PHP explode() Function

PHP extract() Function

PHP implode() Function

PHP in_array() Function

PHP key() Function

PHP krsort() Function

PHP ksort() Function

PHP list() Function

PHP natcasesort() Function

PHP natsort() Function

PHP next() Function

PHP pos() Function

PHP prev() Function

PHP range() Function

PHP reset() Function

PHP rsort() Function

PHP shuffle() Function

PHP sizeof() Function

PHP sort() Function

PHP uasort() Function

PHP uksort() Function

PHP usort() Function