生成(伪)随机字母数字字符串 [英] Generating (pseudo)random alpha-numeric strings

问题描述

如何生成(伪)随机字母数字字符串，例如:PHP中的"d79jd8c"?

How can I generate a (pseudo)random alpha-numeric string, something like: 'd79jd8c' in PHP?

推荐答案

首先创建一个包含所有可能字符的字符串:

First make a string with all your possible characters:

 $characters = 'abcdefghijklmnopqrstuvwxyz0123456789';

您还可以使用 range()更快地执行此操作.

You could also use range() to do this more quickly.

然后，在一个循环中，选择一个随机数并将其用作$characters字符串的索引以获取随机字符，然后将其附加到您的字符串中:

Then, in a loop, choose a random number and use it as the index to the $characters string to get a random character, and append it to your string:

 $string = '';
 $max = strlen($characters) - 1;
 for ($i = 0; $i < $random_string_length; $i++) {
      $string .= $characters[mt_rand(0, $max)];
 }

$random_string_length是随机字符串的长度.

$random_string_length is the length of the random string.

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