我在 PHP 中的加密代码中出错

Question

请问我的代码可能有什么问题？该代码旨在加密给定的字符串。它进行加密非常好，但是当回显加密值时，它会向它添加数字。这是代码：

$keys = "Bb94tU1LSSLgPKNu";
$encrypt = array();
// this contains the key/value pair i used for the encryption
$arrayEncrypt = array("a"=>"g","b"=>"h","c"=>"i","d"=>"j","e"=>"k","f"=>"l","g"=>"m","h"=>"n","i"=>"o","j"=>"p","k"=>"q","l"=>"r", "m"=>"s","n"=>"t","o"=>"u","p"=>"v","q"=>"w","r"=>"x","s"=>"y","t"=>"z","u"=>"a","v"=>"b","w"=>"c","x"=>"d","y"=>"e","z"=>"f","A"=>"G","B"=>"H","C"=>"I","D"=>"J","E"=>"K","F"=>"L","G"=>"M","H"=>"N","I"=>"O","J"=>"P","K"=>"Q","L"=>"R","M"=>"S","N"=>"T","O"=>"U","P"=>"V","Q"=>"W","R"=>"X","S"=>"Y","T"=>"Z","U"=>"A","V"=>"B","W"=>"C","X"=>"D","Y"=>"E","Z"=>"F","0"=>"2","1"=>"4","2"=>"6","3"=>"8","4"=>"0","5"=>"9","6"=>"7","7"=>"5","8"=>"3","9"=>"1");
for ($i = 0; $i < strlen($keys); $i++) {
    if (array_key_exists($keys[$i], $arrayEncrypt)) {  
        foreach ($arrayEncrypt as $key => $letter) {
            if ($keys[$i] == $key) {
                // appends the values of each in $encrypt array
                array_push($encrypt, $letter);
            }
        }
    }
}
$encryptedValue = "";
foreach ($encrypt as $encrypted) {
    $encryptedValue .= $encrypted;
    echo $encryptedValue;
}

它打印：

H2h210z2A24R2Y2Y2R2m2V2Q2T2a2

而不是：

Hh10zA4RYYRmVQTa

Answer 1

无论如何，您尝试使用$i而不是仅使用名称来获取匹配值过于复杂。 str_split(( 要获取字符数组，那么只需$arrayEncrypt[$value]。要撤消，您可以使用 array_flip((。

让你成为一个很好的加密和解密功能。享受

<?php
// 1 to encrypt
// 2 to decrypt
function encdec($do, $keys){
    $arrayEncrypt = array("a"=>"g","b"=>"h","c"=>"i","d"=>"j","e"=>"k","f"=>"l","g"=>"m","h"=>"n","i"=>"o","j"=>"p","k"=>"q","l"=>"r", "m"=>"s","n"=>"t","o"=>"u","p"=>"v","q"=>"w","r"=>"x","s"=>"y","t"=>"z","u"=>"a","v"=>"b","w"=>"c","x"=>"d","y"=>"e","z"=>"f","A"=>"G","B"=>"H","C"=>"I","D"=>"J","E"=>"K","F"=>"L","G"=>"M","H"=>"N","I"=>"O","J"=>"P","K"=>"Q","L"=>"R","M"=>"S","N"=>"T","O"=>"U","P"=>"V","Q"=>"W","R"=>"X","S"=>"Y","T"=>"Z","U"=>"A","V"=>"B","W"=>"C","X"=>"D","Y"=>"E","Z"=>"F","0"=>"2","1"=>"4","2"=>"6","3"=>"8","4"=>"0","5"=>"9","6"=>"7","7"=>"5","8"=>"3","9"=>"1");
    if ($do==2){
        $arrayEncrypt=array_flip($arrayEncrypt);
    }
    $chars = str_split($keys);
    $encryptedValue="";
    foreach($chars as $char=>$value){
        $encryptedValue .= $arrayEncrypt[$value];
    }
    return $encryptedValue;
}
echo "Encrypted key: ".encdec(1,"Bb94tU1LSSLgPKNu")."<br />";
echo "Decrypted key: ".encdec(2,"Hh10zA4RYYRmVQTa")."<br />";
?>