README

用于分布式数据库主键的唯一ID生成器。此算法实现参考了Twitter的Snowflake算法，但在最后的12位中，不仅可以使用随机数，还可以通过指定的字符串获取哈希值。

• 简体中文版文档

ALGORITHM

位结构

64位长整型。

0 xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx x xxxxx xxxxx xxxx xxxxxxxx

详细信息

位标记

中心

0 00000000 00000000 00000000 00000000 00000000 0 11111 00000 0000 00000000

00000000 00000000 00000000 00000000 00000000 00111110 00000000 00000000

00       00       00       00       00       3E       00       00

节点

0 00000000 00000000 00000000 00000000 00000000 0 00000 11111 0000 00000000

00000000 00000000 00000000 00000000 00000000 00000001 11110000 00000000

00       00       00       00       00       01       F0       00

逃逸时间

0 11111111 11111111 11111111 11111111 11111111 1 00000 00000 0000 00000000

01111111 11111111 11111111 11111111 11111111 11000000 00000000 00000000

7F       FF       FF       FF       FF       C0       00       00

随机或哈希值

0 00000000 00000000 00000000 00000000 00000000 0 00000 00000 1111 11111111

00000000 00000000 00000000 00000000 00000000 00000000 00001111 11111111

00       00       00       00       00       00       0F       FF

如何使用

正常创建新ID

$cDId		= CDId::getInstance();
$nCenter	= 0;
$nNode		= 1;

$arrD		= [];
$nNewId	= $cDId->createId( $nCenter, $nNode, null, $arrD );

echo "new id = " . $nNewId . "\r\n";
print_r( $arrD );

输出

new id = 114654484990270790
Array
(
    [center] => 0
    [node] => 1
    [time] => 27335759399
    [rand] => 3398
)

通过指定的字符串创建带有crc32哈希值的新ID

$cDId		= CDId::getInstance();
$nCenter	= 0;
$nNode		= 15;

$sSrc		= "ioext";
$arrD		= [];
$nNewId	= $cDId->createId( $nCenter, $nNode, $sSrc, $arrD );

echo "new id = " . $nNewId . "\r\n";
print_r( $arrD );

输出

new id = 114654631304370386
Array
(
    [center] => 0
    [node] => 1
    [time] => 27335794283
    [rand] => 2258
)

解析ID以获取详细信息

$cDId		= CDId::getInstance();
$arrId		= $cDId->parseId( 114654631304370386 );
print_r( $arrId );

输出

Array
(
    [center] => 0
    [node] => 1
    [time] => 27335794283
    [rand] => 2258
)

安装

# composer require ioext/dedid

更多信息，请访问 https://packagist.org.cn/packages/ioext/dedid