Application example of using PHP to obtain a 6-digit random number that does not exist in redis

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 the following

The example of this article describes how PHP obtains a 6-digit random number that does not exist in redis. Share it with everyone for your reference, the details are as follows:

PHP gets a 6-digit random number

PHP <a href="http://www.php.cn/wiki/1373.html" target="_blank">str_shuffle</a>() Function

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

Parameters	Description
string	Required. Specifies the string to be scrambled.

Use PHP's str_shuffle function:

<?php
$randStr = str_shuffle(&#39;ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890&#39;);
$rand = substr($randStr,0,6);
?>

Example: Get a 6-digit random number that does not exist in redis (set 24 hours Outdated)

$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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