如何使用 PHP/Javascript 生成随机数/字母 [英] How to generate random numbers/letters with PHP/Javascript

问题描述

我找遍了都找不到.我需要一个脚本来通过单击按钮生成随机大写字母和数字.我需要在每 4 个字符之间使用破折号-".谁能指出我正确的方向或知道如何做到这一点?谢谢！

I have looked all over but I can't find it. I need a script to generator random captial letters and numbers at the click of a button. I need to have the dash " - " between every 4 characters. Can anyone point me in the right direction or know how to do this? Thanks!

推荐答案

//generate 4 characters random string
 function generateRandomString($length = 4, $letters = '1234567890QWERTYUIOPASDFGHJKLZXCVBNM'){
    $s = '';
    $lettersLength = strlen($letters)-1;

    for($i = 0 ; $i < $length ; $i++)
    {
        $s .= $letters[rand(0,$lettersLength)];
    }

    return $s;
} 

echo generateRandomString()."-".generateRandomString();

最快的方式.功能还可以改进...写在手边，现在.:)

Fastest way. Function can be improved though... write it at hand, right now. :)

这篇关于如何使用 PHP/Javascript 生成随机数/字母的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！