生成唯一订单号 [英] Generating Unique Order Number

问题描述

我尝试通过Graph API上传Facebook页面的封面图片，但是一旦它更新就会显示在时间轴上。

I am trying to upload the cover image of a Facebook Page via Graph API, But it appears on the Timeline once its updated.

我使用以下字符串检查我的订单号是否是唯一的

I am using the following string to check of my order number is unique

$unique_order_number = strtoupper(substr(md5(microtime()), 0, 8))

现在我想确保这个号码不会被任何其他订单占用，一个循环while或do-while循环来检查赋值。

Now i want to just make sure that this number is not taken by any other order and wanna use a loop while or do-while loop to check the assignment.

public function __unique_order_no() {

    $order_no_exisits = $this->Order->find('first', array('order_no' => $unique_order_number));

    while (!empty($order_no_exisits)) {
        $unique_order_number = strtoupper(substr(md5(microtime()), 0, 8));
        $order_no_exisits = $this->Order->find('first', array('order_no' => $unique_order_number));
        debug($order_no_exisits);
    }

    debug($order_no_exisits);


}

如何使用While循环运行它，直到我得到一个唯一的数字？

How can i use a While Loop to run it till i get a unique number?

推荐答案

while (!empty($order_no_exisits)) {
$unique_order_number = strtoupper(substr(md5(microtime()), 0, 8));
if(!$this->Order->find('first', array('order_no' => $unique_order_number)))
exit;
}

这篇关于生成唯一订单号的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！