PHP全局唯一ID生成

第PHP全局唯一ID生成*64bit=1bit為空缺+41bit毫秒時間戳+10bit機器id+12bit自增id

*當前結構****最多支持128項業(yè)務

*64bit=1bit空缺+7bit業(yè)務編號(128項業(yè)務)+39bit毫秒時間戳(與2017-06-01的差值)+5bit機器id(32臺)+4bit一級隨機數(shù)+4bit二級隨機數(shù)+4bit三級隨機數(shù)

$machineid_file=/data/machineid.txt

if(file_exists($machineid_file)){

$machine_id=intval(file_get_contents($machineid_file));

if($machine_id31||$machine_id0){

$machine_id=0;

}else{

$machine_id=0;

define(MACHINE_ID,$machine_id);

classBusinessIdHelper

publicstatic$start_stamp=1496246400000;//2017-06-0100:00:00的毫秒級時間戳

publicstatic$max_rand=15;

publicstaticfunctiongenerateId($business_id)

//1bit-頭部空缺

$head_bin=str_pad(decbin(0),1,0,STR_PAD_LEFT);

//7bit-7bit業(yè)務編號(最多128項業(yè)務)

$business_id_bin=str_pad(decbin($business_id),7,0,STR_PAD_LEFT);

//39bit-(now-$start_stamp)的毫秒級時間戳差值

$now_stamp=floor(microtime(true)*1000);

$diff_stamp_bin=str_pad(decbin($now_stamp-self::$start_stamp),39,0,STR_PAD_LEFT);

//5bit-32臺機器

$machine_id_bin=str_pad(decbin(MACHINE_ID),5,0,STR_PAD_LEFT);

//4bit-4位隨機數(shù)(0~15)

//一級

$random1=mt_rand(0,self::$max_rand);

$random1_bin=str_pad(decbin($random1),4,0,STR_PAD_LEFT);

//二級

$random2=mt_rand(0,self::$max_rand);

$random2_bin=str_pad(decbin($random2),4,0,STR_PAD_LEFT);

//三級

$random3=mt_rand(0,self::$max_rand);

$random3_bin=str_pad(decbin($random3),4,0,STR_PAD_LEFT);

//鏈接二進制串

$pack_data=$head_bin.$business_id_bin.$diff_stamp_bin.$machine_id_bin.$random1_bin.$random2_bin.$random3_bin;

var_dump($business_id);

var_dump($now_stamp);

var_dump(MACHINE_ID);

var_dump($pid);

var_dump($pack_data);

returnbindec($pack_data);

publicstaticfunctionparseId($id)

//數(shù)據(jù)不滿64位的，需要補齊

$data_bin=str_pad(decbin($id),64,0,STR_PAD_LEFT);

$head_bin=substr($data_bin,0,1);

$business_id_bin=substr($data_bin,1,7);

$diff_stamp_bin=substr($data_bin,8,39);

$machine_id_bin=substr($data_bin,47,5);

$random1_bin=substr($data_bin,52,4);

$random2_bin=substr($data_bin,56,4);

$random3_bin=substr($data_bin,60,4);

$head=bindec($head_bin);

$business_id=bindec($business_id_bin);

$diff_stamp=bindec($diff_stamp_bin);

$machine_id=bindec($machine_id_bin);

$random1=bindec($random1_bin);

$random2=bindec($random2_bin);

$random3=bindec($random3_bin);

$stamp=self::$start_stamp+$diff_stamp;//毫秒

$data=[

head=$head,

business_id=$business_id,

stamp