PHP ksort() Function (original) (raw)

Last Updated : 20 Jun, 2023

The ksort() function is an inbuilt function in PHP which is used to sort an array in ascending order according to its key values. It sorts in a way that the relationship between the indices and values is maintained.

Syntax:

bool ksort( array,array, array,sorting_type )

Parameters: This function accepts two parameters as mentioned above and described below:

$array: This parameter specifies the array which needs to be sorted. It is a mandatory parameter.
$sorting_type: This is an optional parameter. There are different sorting types which are discussed below:
- SORT_REGULAR: The value of $sorting_type is SORT_REGULAR then items are compare normally.
- SORT_NUMERIC: The value of $sorting_type is SORT_NUMERIC then items are compared numerically.
- SORT_STRING: The value of $sorting_type is SORT_STRING then items are compared as a string.
- SORT_LOCALE_STRING: The value of $sorting_type is SORT_STRING then items are compare as strings, based on the current locale.

Return Value: This function returns True on success or False on failure.

Below programs illustrate the ksort() function in PHP.

Program 1:

<?php

$arr = array ( "13" => "ASP.Net" ,

`` "12" => "C#" ,

`` "11" => "Graphics" ,

`` "4" => "Video Editing" ,

`` "5" => "Photoshop" ,

`` "6" => "Article" ,

`` "4" => "Placement" ,

`` "8" => "C++" ,

`` "7" => "XML" ,

`` "10" => "Android" ,

`` "1" => "SQL" ,

`` "2" => "PL/Sql" ,

`` "3" => "End" ,

`` "0" => "Java" ,

`` );

ksort( $arr );

foreach ( $arr as $key => $val ) {

`` echo "[$key] = $val" ;

`` echo "\n" ;

}

?>

Output:

[0] = Java [1] = SQL [2] = PL/Sql [3] = End [4] = Placement [5] = Photoshop [6] = Article [7] = XML [8] = C++ [10] = Android [11] = Graphics [12] = C# [13] = ASP.Net

Program 2:

<?php

$arr = array ( "z" => 11,

`` "y" => 22,

`` "x" => 33,

`` "n" => 44,

`` "o" => 55,

`` "b" => 66,

`` "a" => 77,

`` "m" => 2,

`` "q" => -11,

`` "i" => 3,

`` "e" => 56,

`` "d" => 1,