Question

我正在尝试这个功能。而第一个密码 - 工作得很完美，我验证了它，但是当我做出解密时它与这个词不匹配。
有人能弄明白为什么不起作用吗？

// Polybius square
  1   2   3   4   5   6
1 A   Ă   Â   B   C   D
2 E   F   G   H   I   Î
3 J   K   L   M   N   O
4 P   Q   R   S   Ș   T
5 Ț   U   V   W   X   Y
6 Z   .   ,   ?   -   !

function cipher($text) {
$alphabet = array('a','ă','â','b','c','d','e','f','g','h','i','î','j','k','l','m','n','o','p','q','r','s','ș','t','ț','u','v','w','x','y','z','.',',','?','-','!');

    $polybios  = array('11','12','13','14','15','16','21','22','23','24','25','26','31','32','33','34','35','36','41','42','43','44','45','46','51','52','53','54','55','56','61','62','63','64','65','66');
    $output  = str_ireplace($alphabet, $polybios, $text);
    return($output);
   }

function decipher($string) {    
    $alphabet = array('a','ă','â','b','c','d','e','f','g','h','i','î','j','k','l','m','n','o','p','q','r','s','ș','t','ț','u','v','w','x','y','z','.',',','?','-','!');

    $polybios  array('11','12','13','14','15','16','21','22','23','24','25','26','31','32','33','34','35','36','41','42','43','44','45','46','51','52','53','54','55','56','61','62','63','64','65','66');
    $output  = str_ireplace($polybios, $alphabet, $string);   
    return($output);
}

$mesaj='cupcake';
$cipherText = cipher($mesaj);

echo $cipherText;

$decipherText = decipher($cipherText);
echo $decipherText;

Answer 1

我认为问题在于，在对原始字符串进行编码后，您将返回一个大数字。 str_ireplace然后不知道一个值的开始位置，另一个值是否能够解码它。

相反，如果您将密码字符串拆分为2个字符的块（所有编码值都是2位数字），并将它们分别解码，再次将它们连接在一起之前，它就能正常工作。

function cipher($string) {
    $alphabet = array('a','ă','â','b','c','d','e','f','g','h','i','î','j','k','l','m','n','o','p','q','r','s','ș','t','ț','u','v','w','x','y','z','.',',','?','-','!');
    $polybios  = array('11','12','13','14','15','16','21','22','23','24','25','26','31','32','33','34','35','36','41','42','43','44','45','46','51','52','53','54','55','56','61','62','63','64','65','66');
    $encoded = str_replace($alphabet, $polybios, str_split($string, 1));

    return implode('', $encoded);
}

function decipher($string) {
    $alphabet = array('a','ă','â','b','c','d','e','f','g','h','i','î','j','k','l','m','n','o','p','q','r','s','ș','t','ț','u','v','w','x','y','z','.',',','?','-','!');
    $polybios = array('11','12','13','14','15','16','21','22','23','24','25','26','31','32','33','34','35','36','41','42','43','44','45','46','51','52','53','54','55','56','61','62','63','64','65','66');
    $decoded = str_replace($polybios, $alphabet, str_split($string, 2));

    return implode('', $decoded);
}

$string = 'cupcake';
$cipher = cipher('cupcake');
$decipher = decipher($cipher);

var_dump($string, $cipher, $decipher);

Php str_ireplace不起作用

1 个答案: