PHP获取6位随机数 PHP获取redis里不存在的6位随机数应用示例【设置24小时过时】

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

$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;
}