How to get a 6-digit random number that does not exist in redis with PHP

This article mainly introduces the method of PHP to obtain 6-digit random numbers that do not exist in redis. It can set a 24-hour expiration limit and involves PHP string and database related operation skills. Friends who need it can refer to it

PHP Gets a 6-digit random number

PHPstr_shuffle()Function

str_shuffle() function randomly shuffles Garble all characters in the string.

Example: Get redis A 6-digit random number that does not exist in it (set to expire in 24 hours)

$port_number = '1605D1BCC6C8027BA0223147652D67D6'; $send_number = $this->getSixRandNumber(); $rs = $this->redis->setKeyValue('ports:' . $send_number,$port_number); //以秒为最小单位 $this->redis->setTimeout('ports:' . $send_number,24*3600); /** * 获取6位数随机数 */ protected function getSixRandNumber(){ $randStr = str_shuffle('1234567890'); $rand = substr($randStr,0,6); $port = $this->redis->getItemByKey('ports:' .$rand); //存在的重新取 if($port != null){ return $this->getSixRandNumber(); } return $rand; }

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