用户注册后！怎样随机产生一个数字号码给注册着？？？在线等待

Question

用函数rand(0,9)
里面0,9可以采用时间的随机种子好一些

Answer 1

用户表中的ID可设为auto_increment
在insert成功后用mysql_insert_id()获得个ID号

Answer 2

binscut(迷雾)的办法应该可以。利用数据库自动加1，不会重复。

Answer 3

谢谢binscut(迷雾)! 我是初学者！ID属性是不是在服务器端设置？在mysql下面修改table？？？多谢

Answer 4

function make_id()
{
$id = "";
$chars = array(
"1","2","3","4","5","6","7","8","9","0",
"a","A","b","B","c","C","d","D","e","E","f","F","g","G","h","H","i","I","j","J",
"k","K","l","L","m","M","n","N","o","O","p","P","q","Q","r","R","s","S","t","T",
"u","U","v","V","w","W","x","X","y","Y","z","Z");

$count = count($chars) - 1;

srand((double)microtime()*1000000); for($i = 0; $i < 8; $i++)
{
$id .= $chars[rand(0, $count)];
}

return($id);
}

Answer 5

你的数据库结构难道不是自己的？create table users (
   id int unsigned not null auto_increment,
...
primary key(id)
);这样插入数据库时，id 字段给NULL，id 就会自动递增
然后调用 mysql_insert_id() 就可以获得此 id 值，这是一个“唯一”的值，我想你所需要的也就是“唯一”的编号吧？