Sort a numeric array having custom index values.
Suppose you are having a array like below.
<?php
$array['ab'] = 'abc';
$array['xy'] = 'xyz';
$array['lm'] = 'lmn';
$array['45'] = '456';
$array['78'] = '789';
$array['12'] = '123';
// Then you can use below solution to sort above array.
echo '<pre>';print_r($array);
//preserve arrays keys for later use
$ar1 = array_keys($array);
//preserve array's values for later use
$ar2 = array_values($array);
//perform sorting by value and then by key
array_multisort($ar2, SORT_ASC, $ar1, SORT_ASC);
//combine sorted values and keys arrays to new array
$sorted_array = array_combine($ar1, $ar2);
echo '<pre>';print_r($sorted_array);
?>
Output will be
Array
(
[12] => 123
[45] => 456
[78] => 789
[ab] => abc
[lm] => lmn
[xy] => xyz
)
