加密算法

算法1：

$type 0 加密 1解密
function jiami($value,$type=0)
{
    $key = config('12312321');//配置文件的加密字符串
    if($type==0){
        str_replace('=','',base64_encode($value ^ $key));
    }else{
        $a = base64_decode($value);
        $a ^ $key;
    }
}

算法2：

/**
 * 加密函数
 * @param string $txt 需要加密的字符串
 * @param string $key 密钥
 * @return string 返回加密结果
 */
function encrypt($txt, $key = '')
{

    if (empty($txt)) return $txt;
    if (empty($key)) $key = md5(MD5_KEY);
    $chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_.";
    $ikey = "-x6g6ZWm2G9g_vr0Bo.pOq3kRIxsZ6rm";
    $nh1 = rand(0, 64);
    $nh2 = rand(0, 64);
    $nh3 = rand(0, 64);
    $ch1 = $chars[$nh1];
    $ch2 = $chars[$nh2];
    $ch3 = $chars[$nh3];
    $nhnum = $nh1 + $nh2 + $nh3;
    $knum = 0;
    $i = 0;
    while (isset($key[$i])) $knum += ord($key[$i++]);

    $mdKey = substr(md5(md5(md5($key . $ch1) . $ch2 . $ikey) . $ch3), $nhnum % 8, $knum % 8 + 16);
    $txt = base64_encode(time() . '_' . $txt);
    $txt = str_replace(array('+', '/', '='), array('-', '_', '.'), $txt);
    $tmp = '';
    $j = 0;
    $k = 0;
    $tlen = strlen($txt);
    $klen = strlen($mdKey);

    for ($i = 0; $i < $tlen; $i++) {
        $k = $k == $klen ? 0 : $k;
        $j = ($nhnum + strpos($chars, $txt[$i]) + ord($mdKey[$k++])) % 64;
        $tmp .= $chars[$j];
    }

    $tmplen = strlen($tmp);
    $tmp = substr_replace($tmp, $ch3, $nh2 % ++$tmplen, 0);
    $tmp = substr_replace($tmp, $ch2, $nh1 % ++$tmplen, 0);
    $tmp = substr_replace($tmp, $ch1, $knum % ++$tmplen, 0);
    return $tmp;
}

/**
 * 解密函数
 * @param string $txt 需要解密的字符串
 * @param string $key 密匙
 * @return string 字符串类型的返回结果
 */
function decrypt($txt, $key = '', $ttl = 0)
{

    if (empty($txt)) return $txt;
    if (empty($key)) $key = md5(MD5_KEY);
    $chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_.";
    $ikey = "-x6g6ZWm2G9g_vr0Bo.pOq3kRIxsZ6rm";
    $knum = 0;
    $i = 0;
    $tlen = @strlen($txt);
    while (isset($key[$i])) $knum += ord($key[$i++]);

    $ch1 = @$txt[$knum % $tlen];
    $nh1 = strpos($chars, $ch1);
    $txt = @substr_replace($txt, '', $knum % $tlen--, 1);
    $ch2 = @$txt[$nh1 % $tlen];
    $nh2 = @strpos($chars, $ch2);
    $txt = @substr_replace($txt, '', $nh1 % $tlen--, 1);
    $ch3 = @$txt[$nh2 % $tlen];
    $nh3 = @strpos($chars, $ch3);
    $txt = @substr_replace($txt, '', $nh2 % $tlen--, 1);
    $nhnum = $nh1 + $nh2 + $nh3;
    $mdKey = substr(md5(md5(md5($key . $ch1) . $ch2 . $ikey) . $ch3), $nhnum % 8, $knum % 8 + 16);
    $tmp = '';
    $j = 0;
    $k = 0;
    $tlen = @strlen($txt);
    $klen = @strlen($mdKey);

    for ($i = 0; $i < $tlen; $i++) {
        $k = $k == $klen ? 0 : $k;
        $j = strpos($chars, $txt[$i]) - $nhnum - ord($mdKey[$k++]);
        while ($j < 0)
            $j += 64;
            $tmp .= $chars[$j];
    }

    $tmp = str_replace(array('-', '_', '.'), array('+', '/', '='), $tmp);
    $tmp = trim(base64_decode($tmp));
    if (preg_match("/\d{10}_/s", substr($tmp, 0, 11))) {
        if ($ttl > 0 && (time() - substr($tmp, 0, 11) > $ttl)) {
            $tmp = null;
        } else {
            $tmp = substr($tmp, 11);
        }
    }
    return $tmp;
}