59 lines
1.3 KiB
PHP
59 lines
1.3 KiB
PHP
<?php
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namespace addons\xilufitness\library;
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/**
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* 雪花算法生成唯一id
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* Class SnowFlake
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* @package app\xilufitness\library
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*/
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class SnowFlake {
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protected static $instance;
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private static $machineId;
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private function __construct() {
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self::$machineId = ip2long(gethostbyname(gethostname()));
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}
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public static function getInstance() {
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if (self::$instance === null) {
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self::$instance = new self();
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}
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return self::$instance;
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}
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public function createID(){
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// 假设一个机器id
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// $machineId = ip2long(gethostbyname(gethostname()));
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//41bit timestamp(毫秒)
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$time = floor(microtime(true) * 1000);
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//0bit 未使用
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$suffix = 0;
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//datacenterId 添加数据的时间
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$base = decbin(pow(2,40) - 1 + $time);
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//workerId 机器ID
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$machineid = decbin(pow(2,9) - 1 + self::$machineId);
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//毫秒类的计数
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$random = mt_rand(1, pow(2,11)-1);
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$random = decbin(pow(2,11)-1 + $random);
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//拼装所有数据
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$base64 = $suffix.$base.$machineid.$random;
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//将二进制转换int
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$base64 = bindec($base64);
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return sprintf('%.0f', $base64);
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}
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}
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//$id = (SnowFlake::getInstance())->createID();
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