PHP Array Exercises : Sort a multi-dimensional array set by a specific key
23. Sort Multi-Dimensional Array by Specific Key
Write a PHP program to sort a multi-dimensional array set by a specific key.
Sample Solution:
PHP Code:
<?php
// Define a function named 'column_Sort' for sorting a multi-dimensional array based on a specified column
function column_Sort($unsorted, $column) {
// Create a copy of the unsorted array to be sorted
$sorted = $unsorted;
// Iterate through the array using bubble sort algorithm
for ($i = 0; $i < sizeof($sorted) - 1; $i++) {
for ($j = 0; $j < sizeof($sorted) - 1 - $i; $j++) {
// Compare values in the specified column and swap if necessary
if ($sorted[$j][$column] > $sorted[$j + 1][$column]) {
$tmp = $sorted[$j];
$sorted[$j] = $sorted[$j + 1];
$sorted[$j + 1] = $tmp;
}
}
}
// Return the sorted array
return $sorted;
}
// Initialize a multi-dimensional array $my_array with sample data
$my_array = array();
$my_array[0]['name'] = 'Sana';
$my_array[0]['email'] = '[email protected]';
$my_array[0]['phone'] = '111-111-1234';
$my_array[0]['country'] = 'USA';
$my_array[1]['name'] = 'Robin';
$my_array[1]['email'] = '[email protected]';
$my_array[1]['phone'] = '222-222-1235';
$my_array[1]['country'] = 'UK';
$my_array[2]['name'] = 'Sofia';
$my_array[2]['email'] = '[email protected]';
$my_array[2]['phone'] = '333-333-1236';
$my_array[2]['country'] = 'India';
// Print the sorted array based on the 'name' column
print_r(column_Sort($my_array, 'name'));
?>
Output:
Array
(
[0] => Array
(
[name] => Robin
[email] => [email protected]
[phone] => 222-222-1235
[country] => UK
)
[1] => Array
(
[name] => Sana
[email] => [email protected]
[phone] => 111-111-1234
[country] => USA
)
[2] => Array
(
[name] => Sofia
[email] => [email protected]
[phone] => 333-333-1236
[country] => India
)
)
Flowchart:
For more Practice: Solve these Related Problems:
- Write a PHP function to sort a two-dimensional array by a specified key using array_multisort.
- Write a PHP script to dynamically sort a multi-dimensional array on different keys based on user input.
- Write a PHP program to sort an array of associative arrays by a particular key and output the sorted array.
- Write a PHP script to implement custom sorting on a multi-dimensional array using usort() with a callback that compares a specific key.
Go to:
PREV : Sort Array by Day and Username.
NEXT : Case-Insensitive Natural Order Sorting.
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