Random.php
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<?php
namespace fast;
/**
* 随机生成类
*/
class Random
{
/**
* 生成数字和字母
*
* @param int $len 长度
* @return string
*/
public static function alnum($len = 6)
{
return self::build('alnum', $len);
}
/**
* 仅生成字符
*
* @param int $len 长度
* @return string
*/
public static function alpha($len = 6)
{
return self::build('alpha', $len);
}
/**
* 生成指定长度的随机数字
*
* @param int $len 长度
* @return string
*/
public static function numeric($len = 4)
{
return self::build('numeric', $len);
}
/**
* 生成指定长度的无0随机数字
*
* @param int $len 长度
* @return string
*/
public static function nozero($len = 4)
{
return self::build('nozero', $len);
}
/**
* 能用的随机数生成
* @param string $type 类型 alpha/alnum/numeric/nozero/unique/md5/encrypt/sha1
* @param int $len 长度
* @return string
*/
public static function build($type = 'alnum', $len = 8)
{
switch ($type) {
case 'alpha':
case 'alnum':
case 'numeric':
case 'nozero':
switch ($type) {
case 'alpha':
$pool = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
break;
case 'alnum':
$pool = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
break;
case 'numeric':
$pool = '0123456789';
break;
case 'nozero':
$pool = '123456789';
break;
}
return substr(str_shuffle(str_repeat($pool, ceil($len / strlen($pool)))), 0, $len);
case 'unique':
case 'md5':
return md5(uniqid(mt_rand()));
case 'encrypt':
case 'sha1':
return sha1(uniqid(mt_rand(), true));
}
}
/**
* 获取全球唯一标识
* @return string
*/
public static function uuid()
{
return sprintf(
'%04x%04x-%04x-%04x-%04x-%04x%04x%04x',
mt_rand(0, 0xffff),
mt_rand(0, 0xffff),
mt_rand(0, 0xffff),
mt_rand(0, 0x0fff) | 0x4000,
mt_rand(0, 0x3fff) | 0x8000,
mt_rand(0, 0xffff),
mt_rand(0, 0xffff),
mt_rand(0, 0xffff)
);
}
}