PHP生成字母的每2个字符组合.扭曲:允许重复的字母 [英] PHP Generate every 2 character combo of the alphabet. Twist: duplicates letters allowed

问题描述

我相信，仅使用字母，大约有6700万个两个字符串的组合.

I believe there is something like 67 million combination of two character strings using only the letters of the alphabet.

我基本上想要在PHP中包含类似以下内容的数组
Array
(
[1] => AA
[2] => AB
[3] => AC
[4] => AD
[5] => AE
[6] => AF
[7] => AG
[8] => AH
[9] => AI
[10] => AJ
.... and so on
)

I basically want an array in PHP containing something like the following
Array
(
[1] => AA
[2] => AB
[3] => AC
[4] => AD
[5] => AE
[6] => AF
[7] => AG
[8] => AH
[9] => AI
[10] => AJ
.... and so on
)

推荐答案

有两个循环，您可以这样做:

with two loop you can do this:

<?php 
$arr = array('A', 'B', 'C');
foreach ($arr as $value1) {
    foreach ($arr as $value2) {
        echo $value1.$value2;
    }
}
?>

然后您可以将结果放入数组中.

Then you can put the result in an array.

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