Two groups of easy PHP decryption and decryption code

Two groups of simple PHP decryption and decryption code
http://www.phper.org.cn/?post=133
The encryption algorithm is as follows:

function Encrypt ($data, $key) {$key =md5 ($key);    $x =0;    $len =strlen ($data);    $l =strlen ($key);    for ($i = 0; $i < $len; $i + +)    {        if ($x = = $l)         {        $x = 0;        }        $char. = $key {$x};        $x + +;    }    for ($i = 0; $i < $len; $i + +)    {        $str. = Chr (Ord ($data {$i}) + (Ord ($char {$i}))%);    }    Return Base64_encode ($STR);}

The decryption algorithm is as follows:

function Decrypt ($data, $key) {$key = MD5 ($key);    $x = 0;    $data = Base64_decode ($data);    $len = strlen ($data);    $l = strlen ($key);    for ($i = 0; $i < $len; $i + +)    {        if ($x = = $l)         {        $x = 0;        }        $char. = substr ($key, $x, 1);        $x + +;    }    for ($i = 0; $i < $len; $i + +)    {        if (Ord (substr ($data, $i, 1)) < Ord (substr ($char, $i, 1))        {            $st R. = Chr ((Ord ($data, $i, 1) + substr)-Ord (substr ($char, $i, 1)));        }        else        {            $str. = Chr (Ord (substr ($data, $i, 1))-Ord (substr ($char, $i, 1)));        }    }    return $STR;}

Use:

$data = ' PHP encryption and decryption algorithm ';//encrypted information $key = ' 123 ';//Key $encrypt = Encrypt ($data, $key); $decrypt = Decrypt ($encrypt, $key); Echo $enc Rypt, "\ n", $decrypt;

Http://www.thinkphp.cn/code/282.html

/** * Universal Encryption * @param string $string strings that need to be encrypted * @param string $skey encryption Eky * @author Anyon Zou
 
  * @date 2013-08-13 19:30 * @return String */function EnCode ($string = ", $skey = ' echounion ') {$skey = Array_reverse    (Str_split ($skey));    $STRARR = Str_split (Base64_encode ($string));    $strCount = count ($STRARR);    foreach ($skey as $key = $value) {$key < $strCount && $strArr [$key].= $value; } return Str_replace (' = ', ' o0o0o ', join (', $STRARR)); }/** * Universal decryption * @param string $string The string to decrypt * @param string $skey Decrypt key * @return String * @author Anyon Zou
  
   
    * @date 2013-08-13 19:30 */function DeCode ($string = ", $skey = ' echounion ') {$skey = Array_reverse (str_split    ($skey));    $STRARR = Str_split (Str_replace (' o0o0o ', ' = ', $string), 2);    $strCount = count ($STRARR);     foreach ($skey as $key = + $value) {$key < $strCount && $STRARR [$key] = RTrim ($STRARR [$key], $value); } return Base64_decode (Join (', $STRARR)); }

   
  
 

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