如何创建唯一的ID，例如YouTube？ [英] How do I create unique IDs, like YouTube?

问题描述

我一直想知道他们这样做的方式和原因……例如： http：// youtube .com / watch？v = DnAMjq0haic

I've always wondered how and why they do this...an example: http://youtube.com/watch?v=DnAMjq0haic

这些ID是如何生成的，因此没有重复项，与使用简单的自动方式相比有什么优势

How are these IDs generated such that there are no duplicates, and what advantage does this have over having a simple auto incrementing numeric ID?

如何使它简短但又保持唯一性？ uniqid创建的字符串相当长。

How do one keep it short but still keep it's uniqueness? The string uniqid creates are pretty long.

推荐答案

Kevin van Zonneveld写了出色的文章包括一个PHP函数来完全做到这一点。他的方法是我研究此主题时发现的最好方法。

Kevin van Zonneveld has written an excellent article including a PHP function to do exactly this. His approach is the best I've found while researching this topic.

他的功能非常聪明。它使用固定的$ index变量，因此可以删除有问题的字符（例如，元音，或者避免O和0混淆）。还可以选择混淆ID，以使它们不容易猜测。

His function is quite clever. It uses a fixed $index variable so problematic characters can be removed (vowels for instance, or to avoid O and 0 confusion). It also has an option to obfuscate ids so that they are not easily guessable.

这篇关于如何创建唯一的ID，例如YouTube？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！