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62 lines
2.1 KiB
PHP
62 lines
2.1 KiB
PHP
<?php
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/**
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* 构建各类有意义的随机数
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* @since 2018-08-07
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* @author zhaoxiang <zhaoxiang051405@gmail.com>
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*/
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namespace app\util;
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class StrRandom {
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/**
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* 构建一个随机浮点数
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* @param int $min 整数部分的最小值，默认值为-999999999
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* @param int $max 整数部分的最大值，默认值为999999999
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* @param int $dmin 小数部分位数的最小值，默认值为 0
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* @param int $dmax 小数部分位数的最大值，默认值为 8
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* @return float
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* @author zhaoxiang <zhaoxiang051405@gmail.com>
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*/
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public static function randomFloat($min = -999999999, $max = 999999999, $dmin = 0, $dmax = 8) {
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if ($max <= $min || $dmax <= $dmin) {
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return 0.0;
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}
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$rand = '';
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$intNum = mt_rand($min, $max);
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$floatLength = mt_rand($dmin, $dmax);
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if ($floatLength > 1) {
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$rand = Strs::randString($floatLength - 1, 1);
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}
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$floatEnd = mt_rand(1, 9);
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return floatval($intNum . '.' . $rand . $floatEnd);
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}
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/**
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* 构建随机IP地址
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* @return string
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* @author zhaoxiang <zhaoxiang051405@gmail.com>
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*/
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public static function randomIp() {
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$ipLong = [
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['607649792', '608174079'], // 36.56.0.0-36.63.255.255
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['1038614528', '1039007743'], // 61.232.0.0-61.237.255.255
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['1783627776', '1784676351'], // 106.80.0.0-106.95.255.255
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['2035023872', '2035154943'], // 121.76.0.0-121.77.255.255
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['2078801920', '2079064063'], // 123.232.0.0-123.235.255.255
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['-1950089216', '-1948778497'], // 139.196.0.0-139.215.255.255
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['-1425539072', '-1425014785'], // 171.8.0.0-171.15.255.255
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['-1236271104', '-1235419137'], // 182.80.0.0-182.92.255.255
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['-770113536', '-768606209'], // 210.25.0.0-210.47.255.255
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['-569376768', '-564133889'], // 222.16.0.0-222.95.255.255
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];
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$randKey = mt_rand(0, 9);
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return $ip = long2ip(mt_rand($ipLong[$randKey][0], $ipLong[$randKey][1]));
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}
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}
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