php生成唯一id_如何在PHP中生成唯一ID

悠悠 2022-12-06 15:45 320阅读 0赞

php生成唯一id

A unique user ID can be created in [PHP][] using the *uniqid ()* function. This function has two parameters you can set.

可以使用*uniqid()*函数在[PHP中][PHP]创建唯一的用户ID。 此功能有两个参数可以设置。

The first is the prefix, which is what will be appended to the beginning of each ID. The second is more\_entropy. If this is false or not specified, it will return 13 characters; if it's true, 23 characters will be returned.

第一个是前缀，这是将添加到每个ID开头的前缀。 第二个是more\_entropy。 如果为false或未指定，则将返回13个字符；否则为false。 如果为true，则将返回23个字符。

## 创建唯一ID的示例 **(** Examples For Creating a Unique ID **)** ##

Below are examples of creating a unique user ID, but each are a little different.

以下是创建唯一用户ID的示例，但每个示例都有一些不同。

The first creates a normal unique ID while the second shows how to make a longer ID. The third example creates an ID with a [random number][] as the prefix while the last line can be used to encrypt the username before storing it.

第一个创建普通的唯一ID，第二个显示如何制作更长的ID。 第三个示例创建一个以[随机数][random number]作为前缀的ID，而最后一行可在存储用户名之前用于加密用户名。

//creates a unique id with the 'about' prefix $a = uniqid(about); echo $a; echo "

//creates a longer unique id with the 'about' prefix $b = uniqid (about, true); Echo $b; echo "

//creates a unique ID with a random number as a prefix - more secure than a static prefix $c = uniqid (rand (),true); echo $c; echo "

//this md5 encrypts the username from above, so its ready to be stored in your database $md5c = md5($c); e

> 翻译自: [https://www.thoughtco.com/how-to-generate-unique-id-2694169][https_www.thoughtco.com_how-to-generate-unique-id-2694169]

php生成唯一id

[PHP]: https://www.thoughtco.com/beginners-guide-to-php-programing-2693961
[random number]: https://www.thoughtco.com/rand-php-function-2694085
[https_www.thoughtco.com_how-to-generate-unique-id-2694169]: https://www.thoughtco.com/how-to-generate-unique-id-2694169