一段PHP网络验证代码

<?
error_reporting(1);
$hostname='127.0.0.1'; //服务器
$username='root'; //用户名
$passowrd='123456'; //密码
$db='netdb'; //数据库名
$xsplit="[xW|Col]";
$ysplit="[xW|Row]";
$passtea = 'test';//密码
$passmd5 = md5($passtea);
$connect = mysql_connect($hostname,$username,$passowrd);
if (!$connect) {
echo "连接失败！";
exit();
}

$method='post';
$method=='post'?$_POST[post]:$_GET[post];
$sql=str_replace("|","+", $post);

$sql = xxtea_decrypt($sql, $passtea);

$sjc =explode('$', $sql);

$array = explode('!', $sjc[0]);

$pass = $array[0];

$data = chrascii($array[1]);
if ($pass!='')
$data1 = xxtea_decrypt($data, $pass);

if ($data1=md5($passtea))
$tmp = chrascii($array[2]);
if ($passtea!='' and $pass!='')
$tmp1 = xxtea_decrypt($tmp, $passtea.$pass);
$sql = $tmp1;

mysql_select_db($db);
mysql_query("set names $char;");
$query=mysql_query($sql);
$err=mysql_error();

if($err!=''){
 echo '-1';
 exit();
}

if(substr(strtolower($sql),0,6)=='select'){
 while( $result[] = mysql_fetch_array($query) ){
 }
 array_pop( $result );
 
 foreach($result as $k){
  for($i=0;$i<count($k)/2;$i++){
   $info .=$k[$i].$xsplit;
   }
   $info .=$ysplit;
 }

$suiji=rand(10,999);
$zifuji=xxtea_encrypt($passmd5,$suiji);
$wenben1=ordascii($zifuji);

$zifuji2=xxtea_encrypt($info,$passtea.$suiji);
$wenben2=ordascii($zifuji2);

$jieguo=$suiji."!".$wenben1."!".$wenben2;

$jieguo1=xxtea_encrypt($jieguo."$".$sjc[1],$passtea);
echo $jieguo1;

}else{
echo mysql_affected_rows();
}

 

    function long2str($v, $w) {
        $len = count($v);
        $n = ($len - 1) << 2;
        if ($w) {
            $m = $v[$len - 1];
            if (($m < $n - 3) || ($m > $n)) return false;
            $n = $m;
        }
        $s = array();
        for ($i = 0; $i < $len; $i++) {
            $s[$i] = pack("V", $v[$i]);
        }
        if ($w) {
            return substr(join('', $s), 0, $n);
        }
        else {
            return join('', $s);
        }
    }
 
    function str2long($s, $w) {
        $v = unpack("V*", $s. str_repeat("\0", (4 - strlen($s) % 4) & 3));
        $v = array_values($v);
        if ($w) {
            $v[count($v)] = strlen($s);
        }
        return $v;
    }

    function int32($n) {
        while ($n >= 2147483648) $n -= 4294967296;
        while ($n <= -2147483649) $n += 4294967296;
        return (int)$n;
    }

    function xxtea_encrypt($str, $key) {
        if ($str == "") {
            return "";
        }
        $str = iconv("GBK", "UTF-8", $str);
        $v = str2long($str, true);
        $k = str2long($key, false);
        if (count($k) < 4) {
            for ($i = count($k); $i < 4; $i++) {
                $k[$i] = 0;
            }
        }
        $n = count($v) - 1;

        $z = $v[$n];
        $y = $v[0];
        $delta = 0x9E3779B9;
        $q = floor(6 + 52 / ($n + 1));
        $sum = 0;
        while (0 < $q--) {
            $sum = int32($sum + $delta);
            $e = $sum >> 2 & 3;
            for ($p = 0; $p < $n; $p++) {
                $y = $v[$p + 1];
                $mx = int32((($z >> 5 & 0x07ffffff) ^ $y << 2) + (($y >> 3 & 0x1fffffff) ^ $z << 4)) ^ int32(($sum ^ $y) + ($k[$p & 3 ^ $e] ^ $z));
                $z = $v[$p] = int32($v[$p] + $mx);
            }
            $y = $v[0];
            $mx = int32((($z >> 5 & 0x07ffffff) ^ $y << 2) + (($y >> 3 & 0x1fffffff) ^ $z << 4)) ^ int32(($sum ^ $y) + ($k[$p & 3 ^ $e] ^ $z));
            $z = $v[$n] = int32($v[$n] + $mx);
        }
        return base64_encode(long2str($v, false));
    }

    function xxtea_decrypt($str, $key) {
        if ($str == "") {
            return "";
        }
        $str =  base64_decode($str);
        $v = str2long($str, false);
        $k = str2long($key, false);
        if (count($k) < 4) {
            for ($i = count($k); $i < 4; $i++) {
                $k[$i] = 0;
            }
        }
        $n = count($v) - 1;

        $z = $v[$n];
        $y = $v[0];
        $delta = 0x9E3779B9;
        $q = floor(6 + 52 / ($n + 1));
        $sum = int32($q * $delta);
        while ($sum != 0) {
            $e = $sum >> 2 & 3;
            for ($p = $n; $p > 0; $p--) {
                $z = $v[$p - 1];
                $mx = int32((($z >> 5 & 0x07ffffff) ^ $y << 2) + (($y >> 3 & 0x1fffffff) ^ $z << 4)) ^ int32(($sum ^ $y) + ($k[$p & 3 ^ $e] ^ $z));
                $y = $v[$p] = int32($v[$p] - $mx);
            }
            $z = $v[$n];
            $mx = int32((($z >> 5 & 0x07ffffff) ^ $y << 2) + (($y >> 3 & 0x1fffffff) ^ $z << 4)) ^ int32(($sum ^ $y) + ($k[$p & 3 ^ $e] ^ $z));
            $y = $v[0] = int32($v[0] - $mx);
            $sum = int32($sum - $delta);
        }
        return iconv("UTF-8", "GBK",long2str($v, true));
    }

function ordascii($code) {
 $i=0;
 $b = strlen($code);
 for ($i=0; $i<$b; $i++)
 {
 $new .= ord(substr($code, $i ,1)).'?';
 }
return $new;
}

function chrascii($code) {
 $i=0;
 $arrays = explode("?", $code);
 $result1 = count($arrays);
 for ($i = 0; $i < $result1; $i++)
 {
 $array .= chr($arrays[$i]);
 }
return $array;
}
?>