In fact, just One line: return MD5(microtime()); Logically, the string returned by microtime() is already unique. After testing, even if microtime() is executed continuously, the return value will have a difference of more than 100us. When the user clicks, it will be transmitted on the network and then sent to the server. The processing interval is much more than a few tens of ms, and adding md5 will only complicate the results. |
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