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