helperFunctions.php

<?php

function tempdir($dir = null, $prefix = 'tmp_', $mode = 0700, $maxAttempts = 1000)
{
    if (is_null($dir))
    {
        $dir = sys_get_temp_dir();
    }

    $dir = rtrim($dir, DIRECTORY_SEPARATOR);
    if (!is_dir($dir) || !is_writable($dir))
    {
        return false;
    }

    if (strpbrk($prefix, '\\/:*?"<>|') !== false)
    {
        return false;
    }
    
    $attempts = 0;
    do
    {
        $path = sprintf('%s%s%s%s', $dir, DIRECTORY_SEPARATOR, $prefix, mt_rand(100000, mt_getrandmax()));
    } while (
        !mkdir($path, $mode) &&
        $attempts++ < $maxAttempts
    );

    return $path;
}

function rmdir_recursive($dir) {
    $it = new RecursiveDirectoryIterator($dir, FilesystemIterator::SKIP_DOTS);
    $it = new RecursiveIteratorIterator($it, RecursiveIteratorIterator::CHILD_FIRST);
    foreach($it as $file) {
        if ($file->isDir()) rmdir($file->getPathname());
        else unlink($file->getPathname());
    }
    rmdir($dir);
}