/**
 * @info 檢查目錄是否存在，若不存在則建立目錄
 * @param object $ossClient
 * @param string $ossFolder
 * @param string $filePathWithName
 * @return bool
 * @author Daisy
 * @date 2021/6/28 16:42
 */
function checkDirExists($ossClient, $ossFolder, $filePath)
{
    global $ossBucket;
    $ossName = strstr($filePath, $ossFolder);
    $ossPath = substr($ossName, 0, strpos($ossName, basename($ossName)) - 1);
    $options = ['prefix' => $ossPath];

    $resList = $ossClient->listObjects($ossBucket, $options);
    if (is_object($resList['content'])) {
        $fileExists = $resList['content']->getPrefixList();
        if ($fileExists == $ossPath) {
            return true;//目錄存在，無需建立
        }
    }

    try {
        $ossClient->createObjectDir($ossBucket, $ossPath);
    } catch (\Exception $ex) {
        writeLog('建立目錄失敗：' . $ossPath);
        return false;
    }
    return true;
}

參考資料1：
 
https://help.aliyun.com/document_detail/88510.html?spm=a2c4g.11186623.6.1039.6370531cLLHu55

參考資料2：http://docs-aliyun.cn-hangzhou.oss.aliyun-inc.com/pdf/oss-sdk-intl-zh-2017-06-28.pdf