PHP动态创建字母 [英] PHP dynamic creation of alphabet

问题描述

我想造成一些麻烦.首先，我想告诉您这是什么意思，以便您了解我这样做的原因:

I would like to create some arrys. First of all I would like to tell you what it is about so that you understand why I am doing this:

密码学.

我想用字母创建一个数组.

I want create an array with the alphabet.

例如

$a1 = array("a"=>"b", "b"=>"c",....,"z"=>a");

好吧，这只是键入的一部分，所以现在我想多做一点.在这种情况下，它是x + 1 = y或换句话说，是用于解码x = y-1

Alright, that is just a bit of typing so now I want to do it a bit more often. In this case it is x+1=y or in other words for the decoding x=y-1

所以可以说，我希望将位置从1更改为26来实现-我将拥有26个数组.

So lets say I would like to do that with a position change from 1 to 26 - I would have 26 arrays than.

在php中，加密和解密本身不是问题，不是我要的，因为它是简单的字符串替换.但是我想知道是否有这样的事情可以通过告诉以下动态方式来创建:

The encryption and decryption itself is not that problem in php and not what I am asking for as it is simple string replacement. But I was wondering if there is anything like this possible to create in an dynamic way by telling:

createAlphabets(1,12)

createAlphabets(1,12)

它创建了一个包含12个字母键的多维数组?

and it creates me a multidimensional array with 12 alphabet keys?

这是我问题的第二部分:

This is the second part of my question:

在数学上是否存在通过计算交换字符的更多可能性?

is there mathematically figure of more possibilities to swap characters by calculation?

我的意思是，x + 5-3 = y与x + 2 = y相同，所以我计算出它被26个数组覆盖了吗?所以即使我说:x-5 + 3 = y =? x-2 = y就像x + 24 = y一样吗?是不是请不要费心告诉我它可能是+25或+23，并且我将不会有24个阵列-上午8点，我没有睡觉-我只是在询问原理-我不想让你做我的工作-我是只是寻找一些确认和想法.

I mean, x+5-3=y is the same like x+2=y so however I calculate it is covered by my 26 arrays? so even if I say: x-5+3=y =? x-2=y it is the same like x+24=y ? isnt it? Please dont bother telling me it might be +25 or +23 and that I am not going to have 24 arrays - its 8am and I didnt sleep - I am just asking about the principle - I dont want you to do my work - I am just looking for some comfirmation and an idea.

推荐答案

$chars = range('a', 'z');
$shift = 5;
$shifted = array_merge(array_slice($chars, $shift), array_slice($chars, 0, $shift));
$alphabet = array_combine($chars, $shifted);

由于字母中有26个字符，因此您只能将它们移动26个字符，这意味着有26种可能的组合.

Since there are 26 characters in your alphabet you can only shift them by 26 characters, meaning there are 26 possible combinations.

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