How to generate machine code in php

How to generate a machine code in php, a unique value for a client, without duplication, similar to a mac address, so that each machine can only have one registration, preventing registration swiping

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How to generate a machine code in php, a unique value for a client, without duplication, similar to a mac address, so that each machine can only have one registration, preventing registration swiping

It is recommended that this unique identification number should not be used on the server anymore. In the app client interface I have made, whether it is docking IOS or Android, the client will generate a unique Token value and give it to our server. We only need to receive the identification. There is really no need for us to produce it. If you have to do unique generation on the server side, use the PHP built-in function uniqid() to produce it. This is accurate and subtle enough. You can add some parameters yourself. I hope it will be helpful to you

This depends on the specific situation. If the servers are all in a cluster, you can use the server IP, process id, and timestamp

<code>base_convert(ip2long($_SERVER['REMOTE_ADDR']),10,36).'-'.getmypid().'-'.base_convert(microtime(true)*1000 - strtotime('2016-06-07 18:00:00')*1000,10,36)
</code>

It is characterized by being messy and long. At the same time, if there are multiple clusters and the internal IP segments are consistent, it will not work. The advantage is that each server generates it independently.

In addition, the auto-increment of redis and the auto-increment of mysql are also possible. These solutions seem simple, but they are troublesome to maintain. For example, if redis hangs, how to restore the auto-increment field, etc.

Generated by the client, just randomly generate a 6-byte copycat mac address. Basically it will not be repeated and it will be stored in the keychain.