php在给定的两个数之间获取随机浮点数并保留两位小数

<?php
/**
 * 获取m、n之间的随机数，保留2位小数
 * @param $m
 * @param $n
 * @return float
 * @date 2020/7https://cdn.jxasp.com:9143/image/23
 */
function generateRand($m, $n)
{
    if ($m > $n) {
        $numMax = $m;
        $numMin = $n;
    } else {
        $numMax = $n;
        $numMin = $m;
    }
    /**
     * 生成$numMin和$numMax之间的随机浮点数，保留2位小数
     */
    $rand = $numMin + mt_rand() / mt_getrandmax() * ($numMax - $numMin);
    return floatval(number_format($rand,2));
}

echo generateRand(2, 5),"\n"; // 2.45
echo generateRand(2, 5),"\n"; // 3.43
echo generateRand(2, 5),"\n"; // 2.52
?>

参考文章链接：

• https://www.cnblogs.com/xm666/p/11181511.html
• https://www.cnblogs.com/fengshaocom/p/9992277.html
• http://www.02405.com/program/php/1067.html