如何在PHP中从A到Z列出，然后到AA，AB，AC等列出

问题描述

我知道如何从A到Z列出:

I know how to list from A to Z:

foreach (range('A', 'Z') as $char) {
  echo $char . "\n";
}

但是如何从那里继续列出AA，AB，AC，AD，... AZ，BA，BB，BC等?

But how do I go on from there to list AA, AB, AC, AD, ... AZ, BA, BB, BC and so on?

我做了一个快速的Google搜索，但找不到任何东西，尽管我猜想方法会有所不同.

I did a quick Google search and couldn't find anything, though I guess the approach will be different.

我认为我可以通过使用for循环和内部带有字母的数组来做到这一点，尽管这种方式似乎有点不合理.

I think I can do it by using a for loop and an array with the letters inside, though that way seems a bit uncouth.

还有其他方法吗?

谢谢.

推荐答案

PHP的字符串增量运算符可以做到这一点:

PHP has the string increment operator that does exactly that:

for($x = 'A'; $x < 'ZZ'; $x++)
    echo $x, ' ';

结果:

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z AA AB AC AD AE AF... 

参考:

http://php.net/manual/en/language.operators.increment.php

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