Normalize $_FILES returning assoc array.

normalizePostFiles.php

<?php   
function normalizePostFiles(array $postFiles) {
    $files = [];
    if (isset($postFiles['tmp_name']) && is_array($postFiles['tmp_name'])) {
        foreach ($postFiles['tmp_name'] as $i => $file) {
            if (isset(
                $postFiles['name'][$i], $postFiles['type'][$i],
                $postFiles['size'][$i], $postFiles['error'][$i],
                $postFiles['tmp_name'][$i]
            )) {
                $files[$i] = [
                    'name'     => $postFiles['name'][$i],
                    'type'     => $postFiles['type'][$i],
                    'size'     => $postFiles['size'][$i],
                    'error'    => $postFiles['error'][$i],
                    'tmp_name' => $postFiles['tmp_name'][$i],
                ];
            }
        }
    }
    return $files;
}