[PHP] 分配上傳檔案的路徑

<?php

/*數字方式分配路徑*/
function allotPath($id, $extend='jpg') {
    $folders = str_split(sprintf("%012s", $id),3);
    $folders[3] = $id;

    return  '/'. join('/', $folders).'.'.$extend;
}

/*雜湊方式分配路徑*/
function allotHashPath($id, $extend='jpg') {
    $folders = array_slice( str_split(md5($id),2), 0, 4);
    $folders[] = $id;

    return  '/'. join('/', $folders).'.'.$extend;
}

var_dump(allotPath(122333));
// string(23) "/000/000/122/122333.jpg"

var_dump(allotHashPath(122333));
// string(23) "/9c/7c/c2/cd/122333.jpg"