PHP | ksort() Function

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, $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:

filter_none

edit
close

play_arrow

link
brightness_4
code

<?php
// PHP program to illustrate
// ksort()function
  
// Input different array elements
$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",       
        );
  
// Implementation of ksort()
ksort($arr);
  
// for-Loop for displaying result
foreach ($arr as $key => $val) {
    echo "[$key] = $val";
    echo"\n";
}
  
?>

chevron_right


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:

filter_none

edit
close

play_arrow

link
brightness_4
code

      
<?php
// PHP program to illustrate
// ksort function
      
// Input different array elements
$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,                            
        );
  
// Implementation of ksort
ksort($arr);
  
// for-Loop for displaying result
foreach ($arr as $key => $val) {
    echo "[$key] = $val";
    echo"\n";
}
  
?>

chevron_right


Output:

[a] = 77
[b] = 66
[d] = 1
[e] = 56
[i] = 3
[m] = 2
[n] = 44
[o] = 55
[q] = -11
[x] = 33
[y] = 22
[z] = 11

Related Articles:

Reference: http://php.net/manual/en/function.ksort.php




My Personal Notes arrow_drop_up

Check out this Author's contributed articles.

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.



Improved By : Akanksha_Rai

Article Tags :

Be the First to upvote.


Please write to us at contribute@geeksforgeeks.org to report any issue with the above content.