PHP Array Exercises : Sort an associative array by values

Last update on May 30 2025 13:14:46 (UTC/GMT +8 hours)

34. Sort Associative Array (Case-Sensitive by Values)

Write a PHP program to sort an associative array (alphanumeric with case-sensitive data) by values.

Sample Solution:

PHP Code:

<?php
// Define an associative array with string keys and values
$test_array = array(
    0 => 'example1',
    1 => 'Example11',
    2 => 'example10',
    3 => 'Example6',
    4 => 'example4',
    5 => 'EXAMPLE40',
    6 => 'example10'
);

// Sort the array maintaining index association, using a case-insensitive natural order sort
asort($test_array, SORT_STRING | SORT_FLAG_CASE | SORT_NATURAL);

// Display the sorted array using print_r
print_r($test_array);
?>

Output:

Array                                                       
(                                                           
    [0] => example1                                         
    [4] => example4                                         
    [3] => Example6                                         
    [2] => example10                                        
    [6] => example10                                        
    [1] => Example11                                        
    [5] => EXAMPLE40                                        
)

Flowchart:

For more Practice: Solve these Related Problems:

Write a PHP script to sort an associative array containing alphanumeric values in ascending order by value with case sensitivity.
Write a PHP function to sort the array in descending order by value while preserving the keys.
Write a PHP program to compare two sorting methods for an associative array (one using asort() and another using uasort()) and display the outputs.
Write a PHP script to sort an associative array by its values and then output the sorted array in a formatted table.

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