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ksort: Sorting array by Key


We have seen how the elements of data of the array can be sorted by using sort command. Now we will learn how to sort the key part of the array. Each key is associated with a data or element of the array. By using ksort function we can sort the array based on the key order and at the same time associated data link with the key is maintained.

Let us understand this ksort function by this example code.









<?
$input = array ("b" => "Pinaple", "d" =>"Orange", "a" =>"Banana", "c" =>"Mango", "f" =>"Apple","e" =>"Strawberry");
while (list ($key, $val) = each ($input)) {
echo "$key -> $val <br>";
}
ksort($input);
echo "<br>-----After ksort---------<br>";
while (list ($key, $val) = each ($input)) {
echo "$key -> $val <br>";
}
?>

Here is the output

b -> Pinaple
d -> Orange
a -> Banana
c -> Mango
f -> Apple
e -> Strawberry

-----After ksort---------
a -> Banana
b -> Pinaple
c -> Mango
d -> Orange
e -> Strawberry
f -> Apple

Further readings
 PHP array
Array functions in PHP
array : Creating an Array
array_diff Difference of two arrays
array_count_values counting the frequency of values inside an array
count : sizeof Array Size or length
array_push : Adding element to an Array
array_sum : Array Sum of all elements
Displaying the elements of an array
Array checkbox
in_array : IN Array to search for elements inside an array
array_rand : Random elements of Array
array_unique : Array Unique values
Breaking of strings to create array using split command
Session Array to maintain data in different pages
unset : Deleting elements of an array by using its key or value
sort: Simple sorting of PHP array
rsort: Reverse sorting of PHP array
asort: Maintaining index of the elements after sorting
arsort: Sorting in reverse order for a PHP array
ksort: Array key Sorting in PHP
krsort: Array reverse key Sorting in PHP
usort: Sorting array by using user defined function


























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