创建一个14个字符的“随机密钥生成器” [英] Creating a 14 character 'random key generator'

问题描述

我想使用CodeIgniter为学校写一个小程序，生成一个随机的键，每次我点击生成按钮。看看是否有一种方法，我可以创建一个函数，我可以填充一个14个字符的数组随机数字或字母，然后将数组设置为一个变量，我可以调用显示为我生成的密钥。

解决方案

任何和所有的帮助将非常感谢，因为我是新的CodeIgniter。

A back back我在PHP中写了这个函数，它做了它的功能，并给你一些灵活性，以及​​通过复杂性修饰符，我使用一个默认设置的5个不同的级别的字符，长度也是可变的。

我只是想在这里抓住它，尝试解释发生了什么，以及我可以通过评论：

 函数rsg（$ length = 10，$ complexity = 2）{
 //'complexity'字符子集
 $ charSubSets = array（
'abcdefghijklmnopqrstuvwxyz'，
'ABCDEFGHIJKLMNOPQRSTUVWXYZ'，
'0123456789'，
'！@＃$％^& *（）_ + {} |：> ;？< [] \\\\';，。`〜'，
'μñ©æáßðøäåé®þüúóó''
）; 
 
 $ chars =''; 
 
 //将每个子集合成直到复杂性达到空字符串
 for（$ i = 0; $ i  $ chars。= $ charSubSets [$ i]; 
 
 //从组合子集中生成字符串。 
 $ chars = str_split（$ chars）; 
 //为mt_rand限制数组的长度
 $ charCount =（count（$ chars） -  1）; 
 //创建返回字符串
 $ string =''; 
 // idk为什么我用了一段时间，但它不会真正伤害你，当字符串小于100000字符长;）
 $ i = 0; 
 while（$ i< $ length）{
 $ randomNumber = mt_rand（0，$ charCount）; //在数组索引范围内生成数字
 $ string。= $ chars [$ randomNumber]; //从字符串中获取字符
 $ i ++; // increment counter 
} 
 
 return $ string; //返回从随机字符创建的字符
} 
  

这是我目前使用的已经满足了我的需要相当一段时间了，如果任何人阅读这个有改进，我很想听到他们！

I'm trying to use CodeIgniter to write up a small program for school which generates a random 'key' every time I click the 'generate' button. Looking to see if there's a way for me to create a function where I can fill up a 14 character array with a random number or letter and then set the array to a variable which I can call upon to display as my generated key.

Any and all help would be much appreciated as I am new to CodeIgniter.

解决方案

A while back I wrote this function in PHP, it does what it does and gives you some flexibility as well through complexity modifiers, I used a default set of 5 different 'levels' of characters and the length is also variable ofcourse.

I'm just going to chuck it in here and 'try' to explain what is going on as well as I can by comments:

function rsg($length = 10, $complexity = 2) {
        //'complexity' subsets of characters
        $charSubSets = array(
            'abcdefghijklmnopqrstuvwxyz',
            'ABCDEFGHIJKLMNOPQRSTUVWXYZ',
            '0123456789',
            '!@#$%^&*()_+{}|:">?<[]\\\';,.`~',
            'µñ©æáßðøäåé®þüúíóö'
        );

        $chars = '';

        //concact each subset until complexity reached onto empty string            
        for ($i = 0; $i < $complexity; $i++)
            $chars .= $charSubSets[$i];

        //make string from the combined subsets.
        $chars = str_split($chars);
        //define length of array for mt_rand limit
        $charCount = (count($chars) - 1);
        //create string to return
        $string = '';
        //idk why I used a while but it won't really hurt you when the string is less than 100000 chars long ;)
        $i = 0;
        while ($i < $length) {
            $randomNumber = mt_rand(0, $charCount); //generate number within array index range
            $string .= $chars[$randomNumber]; //get that character out of the array
            $i++; //increment counter
        }

        return $string; //return string created from random characters
    }

This is what I currently use and it has satisfied my needs for quite some time now, if anyone reading over this has improvements I'd love to hear them as well!

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