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forecho/Pk.php

Last active December 25, 2015 08:38
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Pk.php
<?php
static $OUR_EPOCH = 1444647842959;
static $DEFAULT_SHARD_ID = 1;
/**
* 生成 bigint64 位主键
* @return int
*/
public static function generatePk()
{
$microTime = intval(microtime(true) * 1000);
$id = ($microTime - static::$OUR_EPOCH) << (64-41);
$id |= (static::$DEFAULT_SHARD_ID << (64-41-13));
$id |= (mt_rand(1, 99999999) % 1024);
return $id;
}
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