我希望能够通过PHP脚本生成许可证密钥，并将其传输到我的应用程序（Air，AS3），然后在该应用程序中正确读取数据。例如，以下是代码：
<?php
error_reporting(E_ALL);
function KeyGen(){
$key = md5(mktime());
$new_key = '';
for($i=1; $i <= 25; $i ++ ){
$new_key .= $key[$i];
if ( $i%5==0 && $i != 25) $new_key.='-';
}
return strtoupper($new_key);
}
echo KeyGen();
?>
好的，让我们分解一下您的要求：
您想要：
如果您只想存储一些信息，但是要使用上面使用的符号集（0-9A-Z）"编码"它，您可以使用以下算法。
这个代码是我写的一个古老的 Python (3) 程序。它肯定不会很花哨，也没有经过很多测试，但我认为它比没有答案要好。将代码移植到 PHP 或 AS 应该非常容易。例如，reduce 语句可以用命令式风格的循环替换。还要注意，在 Python 中 // 表示整数除法。
还应该很容易地将一些压缩/加密功能添加到其中。希望它类似于您想要的。下面开始。
from functools import reduce
class Coder:
def __init__(self, alphabet=None, groups=4):
if not alphabet:
alphabet = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
self.alphabet = alphabet
self.groups = groups
def encode(self, txt):
N = len(self.alphabet)
num = reduce(lambda x,y: (x*256)+y, map(ord, txt))
# encode to alphabet
a = []
while num > 0:
i = num % N
a.append(self.alphabet[i])
num -= i
num = num//N
c = "".join(a)
if self.groups > 0:
# right zero pad
while len(c) % self.groups != 0:
c = c + self.alphabet[0]
# make groups
return '-'.join([c[x*self.groups:(x+1)*self.groups]
for x in range(len(c)//self.groups)])
return c
def decode(self, txt, separator='-'):
# remove padding zeros and separators
x = txt.rstrip(self.alphabet[0])
if separator != None:
x = x.replace(separator, '')
N = len(self.alphabet)
x = [self.alphabet.find(c) for c in x]
x.reverse()
num = reduce(lambda x,y: (x*N)+y, x)
a = []
while num > 0:
i = num % 256
a.append(i)
num -= i
num = num//256
a.reverse()
return ''.join(map(chr, a))
if __name__ == "__main__":
k = Coder()
s = "Hello world!"
e = k.encode(s)
print("Encoded:", e)
d = k.decode(e)
print("Decoded:", d)
Encoded: D1RD-YU0C-5NVG-5XL8-7620
Decoded: Hello world!
我使用Python找到了Andre's answer的价值。
与提问者一样，我需要一个php解决方案，所以我将安德烈的代码改写为PHP。如果有人觉得有用，我在这里发布它。
然而，它存在着与Python版本不同的限制：
它似乎无法编码任何大于8个字符的字符串。这可能是可以解决的问题？这与PHP如何处理非常大的整数有关。幸运的是，对于我的用例，我只需要编码少于8个字符。它可能在不同的环境下工作，我不确定。总之，在声明这一警告后，这是该类：
<?php
/**
* Basic key generator class based on a simple Python solution by André Laszlo.
* It's probably not secure in any way, shape or form. But may be suitable for
* your requirements (as it was for me).
*
* Due to limitations with PHP's processing of large integers, unlike the Python
* app, only a small amount of data can be encoded / decoded. It appears to
* allow a maximum of 8 unencoded characters.
*
* The original Python app is here: https://dev59.com/T1jUa4cB1Zd3GeqPTqwE#6515005
*/
class KeyGen
{
/**
* @var array
*/
protected $alphabet;
/**
* @var int
*/
protected $groups;
/**
* @var string
*/
protected $separator;
/**
* Controller sets the alphabet and group class properties
*
* @param string $alphabet
* @param int $groups
* @param string $separator
*/
public function __construct(string $alphabet = null, int $groups = 4, string $separator = '-')
{
$alphabet = $alphabet ?: '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ';
$this->alphabet = str_split($alphabet);
$this->groups = $groups;
$this->separator = $separator;
}
/**
* Encodes a string into a typical license key format
*
* @param string $txt
* @return string
*/
public function encode(string $txt)
{
// calculate the magic number
$asciiVals = array_map('ord', str_split($txt));
$num = array_reduce($asciiVals, function($x, $y) {
return ($x * 256) + $y;
});
// encode
$a = [];
$i = 0;
$n = count($this->alphabet);
while ($num > 0) {
$i = $num % $n;
array_push($a, $this->alphabet[$i]);
$num -= $i;
$num = intdiv($num, $n);
}
// add padding digits
$str = implode('', $a);
if($this->groups > 0) {
while (strlen($str) % $this->groups != 0) {
$str .= $this->alphabet[0];
}
}
// split into groups
if($this->groups) {
$split = str_split($str, $this->groups);
$str = implode($this->separator, $split);
}
return $str;
}
/**
* Decodes a license key
*
* @param string $txt
* @return string
*/
public function decode(string $txt)
{
// remove separators and padding
$stripped = str_replace($this->separator, '', $txt);
$stripped = rtrim($stripped, $this->alphabet[0]);
// get array of alphabet positions
$alphabetPosistions = [];
foreach(str_split($stripped) as $char){
array_push($alphabetPosistions, array_search($char, $this->alphabet));
}
// caluculate the magic number
$alphabetPosistions = array_reverse($alphabetPosistions);
$num = array_reduce($alphabetPosistions, function($x, $y) {
$n = count($this->alphabet);
return ($x * $n) + $y;
});
// decode
$a = [];
$i = 0;
$n = count($this->alphabet);
while ($num > 0) {
$i = $num % 256;
array_push($a, $i);
$num -= $i;
$num = intdiv($num, 256);
}
return implode('', array_map('chr', array_reverse($a)));
}
}
以下是一个使用示例，对"ABC123"进行编码和解码：
$keyGen = new KeyGen();
$encoded = $keyGen->encode('ABC123'); //returns 3WJU-YSMF-P000
$decoded = $keyGen->decode('3WJU-YSMF-P000'); //returns ABC123