A bit update to 14 year ago note from "phpuser at gmail dot com".
That update converts to a really more friendly array form incoming _POST info for uploaded files.
And that variants works identical for non-multiple uploads and multiple uploads:
<?php
//Функция переформатирует массив поданных POST'ом файлов
function reArrayFiles(&$file_post){
$isMulti = is_array($file_post['name']);
$file_count = $isMulti?count($file_post['name']):1;
$file_keys = array_keys($file_post);
$file_ary = []; //Итоговый массив
for($i=0; $i<$file_count; $i++)
foreach($file_keys as $key)
if($isMulti)
$file_ary[$i][$key] = $file_post[$key][$i];
else
$file_ary[$i][$key] = $file_post[$key];
return $file_ary;
}
?>