How to use php ksort function

php The ksort function is used to sort an associative array in ascending order by key name. Its syntax is ksort(array, sortingtype). The parameter array is required and refers to the array to be sorted.

#php How to use ksort function?

Definition and usage

ksort() function sorts the associative array in ascending order by key name.

Tip: Please use the krsort() function to sort the associative array in descending order by key name.

Tip: Please use the asort() function to sort the associative array in ascending order by key value.

Syntax

ksort(array,sortingtype);

Parameters

array Required, specifies the array to be sorted.

sortingtype is optional and specifies how to arrange the elements/items of the array. Possible values:

0 = SORT_REGULAR - Default. Put each item in regular order (Standard ASCII, don't change the type).

1 = SORT_NUMERIC - treat each item as a number.

2 = SORT_STRING - Treat each item as a string.

3 = SORT_LOCALE_STRING - Treat each item as a string, based on the current locale (can be changed via setlocale()).

4 = SORT_NATURAL - Treat each item as a string, using natural sorting like natsort().

5 = SORT_FLAG_CASE - Strings can be sorted in combination (bitwise OR) with SORT_STRING or SORT_NATURAL, case-insensitively.

Description

ksort() function sorts the array by key name, retaining the original key for the array value.

The optional second parameter contains additional sorting flags.

If successful, return TRUE, otherwise return FALSE.

Return value: TRUE if successful, FALSE if failed.

PHP Version: 4

Example

Sort the associative array in ascending order by key name:

<?php
$age=array("Bill"=>"60","Steve"=>"56","mark"=>"31");
ksort($age);
?>

Output:

Key=Bill, Value=60
Key=Steve, Value=56
Key=mark, Value=31

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