生成所有6个字符的字母数字组合(大写和小写） - Generating all 6 character alphanumeric combinations (upper and lower case)

Generating all 6 character alphanumeric combinations (upper and lower case)

本文关键字：组合数字 6个字符 | 更新日期: 2023-09-27

我正试图找到一种方法来生成每一个可能的6个字符的字母数字字符串的列表，其中大写字母和小写字母被视为唯一字母。使用以下函数，我们可以使用小写字母和数字生成字符串：

function increasePosition(&$cString, $nPosition) {
    //get the char of the current position
    $cChar = substr($cString, $nPosition - 1, 1);
    //convert to the ascii value (and add one)
    $nChar = ord($cChar) + 1;
    if ($nChar == 58) {
        $nChar = 97; //one past 9, go to a
    }
    if ($nChar == 123) {
        $nChar = 48; //one past z, go to 0
        //we hit z, so increase the next space to the left
        increasePosition($cString, $nPosition - 1);
    }
    //replace the expected position with the new character
    $cString[$nPosition - 1] = chr($nChar);
}
function myCombinations($nSize) {
    //init to 0 repeating.
    $cString = str_repeat('0', $nSize);
    //move the last character 'back' one, so that 0 repeating will be the first item.
    $cString[$nSize - 1] = '/';
    //when to stop.
    $cEnd = str_repeat('z', $nSize);
    while ($cString != $cEnd) {
        increasePosition($cString, $nSize);
        print($cString . " ");
    }
}
myCombinations(2);

源

但是，这并没有考虑大写字母。在PHP的这种算法中，是否可以同时使用大写字母和小写字母？

只需要添加一个小块来处理大写字符：

<?php
function increasePosition(&$cString, $nPosition) {
    //get the char of the current position
    $cChar = substr($cString, $nPosition - 1, 1);
    //convert to the ascii value (and add one)
    $nChar = ord($cChar) + 1;
    if ($nChar == 58) {
        $nChar = 65; //one past 9, go to A
    }
    if ($nChar == 91) {
        $nChar = 97; //one past Z, go to a
    }

    if ($nChar == 123) {
        $nChar = 48; //one past z, go to 0
        //we hit z, so increase the next space to the left
        increasePosition($cString, $nPosition - 1);
    }
    //replace the expected position with the new character
    $cString[$nPosition - 1] = chr($nChar);
}
function myCombinations($nSize) {
    //init to 0 repeating.
    $cString = str_repeat('0', $nSize);
    //move the last character 'back' one, so that 0 repeating will be the first item.
    $cString[$nSize - 1] = '/';
    //when to stop.
    $cEnd = str_repeat('z', $nSize);
    while ($cString != $cEnd) {
        increasePosition($cString, $nSize);
        print($cString . " ");
    }
}
myCombinations(6);