Sort $_FILES by filename [closed] - php

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he guys,
as you know, in new HTML5 you can upload multiple files pretty easily.
but what is my problem here is how to sort $_FILES array by column "name"?
here is sample array of $_FILES
Array (
[item_file] => Array (
[name] => Array (
[0] => redphotonzillion1.jpg
[1] => redphotonzillion2.jpg
[2] => redphotonzillion3.jpg
[3] => redphotonzillion4.jpg
[4] => redphotonzillion5.jpg
[5] => redphotonzillion6.jpg
)
[type] => Array (
[0] => image/jpeg
[1] => image/jpeg
[2] => image/jpeg
[3] => image/jpeg
[4] => image/jpeg
[5] => image/jpeg
)
[tmp_name] => Array (
[0] => /var/www/clients/client0/web6/tmp/phpi4i5fE
[1] => /var/www/clients/client0/web6/tmp/phpzHwagk
[2] => /var/www/clients/client0/web6/tmp/phpYpAgg0
[3] => /var/www/clients/client0/web6/tmp/phpAIdngG
[4] => /var/www/clients/client0/web6/tmp/phpyamugm
[5] => /var/www/clients/client0/web6/tmp/phpFvWBg2
)
[error] => Array (
[0] => 0
[1] => 0
[2] => 0
[3] => 0
[4] => 0
[5] => 0
)
[size] => Array (
[0] => 7990
[1] => 8985
[2] => 8014
[3] => 7621
[4] => 7023
[5] => 7151
)
)
)
all i want is to sort this array by name

Answer 1

For this specific case, PHP provides just the right function: array_multisort():
It can sort a multi-dimensional array (or multiple flat arrays) by first sorting the first array and then applying the resulting order to all other arrays as well (see documentation for examples).
array_multisort(
// Array used to sort + optional parameters
$_FILES['item_file']['name'], SORT_ASC, SORT_STRING
// All other arrays to be sorted in the same order
$_FILES['item_file']['type'],
$_FILES['item_file']['tmp_name'],
$_FILES['item_file']['error'],
$_FILES['item_file']['size']
);
This aproach will keep all meta information (type, tmp_name, error, size) assigned to the corresponding index of the file name so it can be used.