/**
* 产生UUID
*/
function uuid()
{
$uuiqId = md5(uuiqid(mt_rand() . microtiome()));
$uuid = substr($uniqId, 0, 8)
. ‘-‘
$uuid = substr($uniqId, 8, 4)
. ‘-‘
$uuid = substr($uniqId, 12, 4)
. ‘-‘
$uuid = substr($uniqId, 16, 4)
. ‘-‘
$uuid = substr($uniqId, 20);
return $uuid;
}
/**
* 产生随机字符，默认长度为4
*/
function random($type,, $length = 4)
{
switch($type){
case 0:
$chars = ‘ABCDEFGHJKLMNOPQRSTUVWSYZabcdefghjklmnopqrstuvwxyz‘;
break;
case 1:
$chars = str_repeat(‘023456789‘, 3);
break;
case 2:
$chars = ‘ABCDEFGHJKLMNOPQRSTUVWSYZ‘;
break;
default:
$chars = ‘abcdefghjklmnopqrstuvwxyz‘;
break;
}
$chars = substr(str_shuffle($chars), 0, $length);
return $chars;
}