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<?php
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// +----------------------------------------------------------------------
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// | ThinkLibrary 6.0 for ThinkPhP 6.0
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// +----------------------------------------------------------------------
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// | 版权所有 2017~2020 [ https://www.dtapp.net ]
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// +----------------------------------------------------------------------
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// | 官方网站: https://gitee.com/liguangchun/ThinkLibrary
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// +----------------------------------------------------------------------
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// | 开源协议 ( https://mit-license.org )
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// +----------------------------------------------------------------------
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// | gitee 仓库地址 ：https://gitee.com/liguangchun/ThinkLibrary
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// | github 仓库地址 ：https://github.com/GC0202/ThinkLibrary
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// | Packagist 地址 ：https://packagist.org/packages/liguangchun/think-library
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// +----------------------------------------------------------------------
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declare (strict_types=1);
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namespace DtApp\ThinkLibrary\helper;
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use Exception;
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/**
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* 随机管理类
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* @mixin Randoms
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* @package DtApp\ThinkLibrary\helper
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*/
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class Randoms
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{
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/**
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* 生成随机
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* @param int $length 长度
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* @param int $type 类型，1 纯数字，2 纯小写字母，3 纯大写字母，4 数字和小写字母，5 数字和大写字母，6 大小写字母，7 数字和大小写字母
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* @return string
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* @throws Exception
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*/
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public function generate(int $length = 6, int $type = 1): string
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{
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// 取字符集数组
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$number = range(0, 9);
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$lowerLetter = range('a', 'z');
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$upperLetter = range('A', 'Z');
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// 根据type合并字符集
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if ($type === 1) {
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$charset = $number;
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} elseif ($type === 2) {
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$charset = $lowerLetter;
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} elseif ($type === 3) {
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$charset = $upperLetter;
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} elseif ($type === 4) {
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$charset = array_merge($number, $lowerLetter);
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} elseif ($type === 5) {
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$charset = array_merge($number, $upperLetter);
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} elseif ($type === 6) {
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$charset = array_merge($lowerLetter, $upperLetter);
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} elseif ($type === 7) {
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$charset = array_merge($number, $lowerLetter, $upperLetter);
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} else {
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$charset = $number;
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}
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$str = '';
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// 生成字符串
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for ($i = 0; $i < $length; $i++) {
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$str .= $charset[random_int(0, count($charset) - 1)];
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// 验证规则
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if ($type === 4 && strlen($str) >= 2) {
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if (!preg_match('/\d+/', $str) || !preg_match('/[a-z]+/', $str)) {
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$str = substr($str, 0, -1);
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--$i;
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}
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}
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if ($type === 5 && strlen($str) >= 2) {
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if (!preg_match('/\d+/', $str) || !preg_match('/[A-Z]+/', $str)) {
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$str = substr($str, 0, -1);
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--$i;
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}
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}
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if ($type === 6 && strlen($str) >= 2) {
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if (!preg_match('/[a-z]+/', $str) || !preg_match('/[A-Z]+/', $str)) {
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$str = substr($str, 0, -1);
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--$i;
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}
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}
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if ($type === 7 && strlen($str) >= 3) {
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if (!preg_match('/\d+/', $str) || !preg_match('/[a-z]+/', $str) || !preg_match('/[A-Z]+/', $str)) {
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$str = substr($str, 0, -2);
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$i -= 2;
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}
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}
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}
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return $str;
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}
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}
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