<?php  function encode_file_contents($filename) {   $type=strtolower(substr(strrchr($filename,'.'),1));   if ('php' == $type && is_file($filename) && is_writable($filename)) { // 如果是PHP文件 并且可寫 則進行壓縮編碼    $contents = file_get_contents($filename); // 判斷文件是否已經被編碼處理    $contents = php_strip_whitespace($filename);     // 去除PHP頭部和尾部標識    $headerPos = strpos($contents,'<?php');    $footerPos = strrpos($contents,'?>');    $contents = substr($contents, $headerPos + 5, $footerPos - $headerPos);    $encode = base64_encode(gzdeflate($contents)); // 開始編碼    $encode = '<?php'."/n eval(gzinflate(base64_decode("."'".$encode."'".")));/n/n?>";     return file_put_contents($filename, $encode);   }   return false;  }   //調用函數  $filename = 'dam.php';  encode_file_contents($filename);  echo "OK,加密完成！"  ?>

<?php   function RandAbc($length = "") { // 返回隨機字符串   $str = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";   return str_shuffle($str);  }   $filename = 'index.php'; //要加密的文件  $T_k1 = RandAbc(); //隨機密匙1  $T_k2 = RandAbc(); //隨機密匙2  $vstr = file_get_contents($filename);  $v1 = base64_encode($vstr);  $c = strtr($v1, $T_k1, $T_k2); //根據密匙替換對應字符。  $c = $T_k1.$T_k2.$c;  $q1 = "O00O0O";  $q2 = "O0O000";  $q3 = "O0OO00";  $q4 = "OO0O00";  $q5 = "OO0000";  $q6 = "O00OO0";  $s = '$'.$q6.'=urldecode("%6E1%7A%62%2F%6D%615%5C%76%740%6928%2D%70%78%75%71%79%2A6%6C%72%6B%64%679%5F%65%68%63%73%77%6F4%2B%6637%6A");$'.$q1.'=$'.$q6.'{3}.$'.$q6.'{6}.$'.$q6.'{33}.$'.$q6.'{30};$'.$q3.'=$'.$q6.'{33}.$'.$q6.'{10}.$'.$q6.'{24}.$'.$q6.'{10}.$'.$q6.'{24};$'.$q4.'=$'.$q3.'{0}.$'.$q6.'{18}.$'.$q6.'{3}.$'.$q3.'{0}.$'.$q3.'{1}.$'.$q6.'{24};$'.$q5.'=$'.$q6.'{7}.$'.$q6.'{13};$'.$q1.'.=$'.$q6.'{22}.$'.$q6.'{36}.$'.$q6.'{29}.$'.$q6.'{26}.$'.$q6.'{30}.$'.$q6.'{32}.$'.$q6.'{35}.$'.$q6.'{26}.$'.$q6.'{30};eval($'.$q1.'("'.base64_encode('$'.$q2.'="'.$c.'";eval(/'?>/'.$'.$q1.'($'.$q3.'($'.$q4.'($'.$q2.',$'.$q5.'*2),$'.$q4.'($'.$q2.',$'.$q5.',$'.$q5.'),$'.$q4.'($'.$q2.',0,$'.$q5.'))));').'"));';   $s = '<?php '."/n".$s."/n".' ?>';  //echo $s;  // 生成 加密后的PHP文件  $fpp1 = fopen('temp_'.$filename, 'w');  fwrite($fpp1, $s) or die('寫文件錯誤');   ?>

<?php   class text_auth  {   var $n_iter;    function text_auth()   {    $this->setIter(32);   }    function setIter($n_iter)   {    $this->n_iter = $n_iter;   }    function getIter()   {    return $this->n_iter;   }    function encrypt($data, $key)   {    $n = $this->_resize($data, 4);     $data_long[0] = $n;    $n_data_long = $this->_str2long(1, $data, $data_long);     $n = count($data_long);    if (($n & 1) == 1) {     $data_long[$n] = chr(0);     $n_data_long++;    }     $this->_resize($key, 16, true);    if ( '' == $key )     $key = '0000000000000000';     $n_key_long = $this->_str2long(0, $key, $key_long);     $enc_data = '';    $w   = array(0, 0);    $j   = 0;    $k   = array(0, 0, 0, 0);    for ($i = 0; $i < $n_data_long; ++$i) {     if ($j + 4 <= $n_key_long) {      $k[0] = $key_long[$j];      $k[1] = $key_long[$j + 1];      $k[2] = $key_long[$j + 2];      $k[3] = $key_long[$j + 3];     } else {      $k[0] = $key_long[$j % $n_key_long];      $k[1] = $key_long[($j + 1) % $n_key_long];      $k[2] = $key_long[($j + 2) % $n_key_long];      $k[3] = $key_long[($j + 3) % $n_key_long];     }     $j = ($j + 4) % $n_key_long;      $this->_encipherLong($data_long[$i], $data_long[++$i], $w, $k);      $enc_data .= $this->_long2str($w[0]);     $enc_data .= $this->_long2str($w[1]);    }     return $enc_data;   }    function decrypt($enc_data, $key)   {    $n_enc_data_long = $this->_str2long(0, $enc_data, $enc_data_long);     $this->_resize($key, 16, true);    if ( '' == $key )     $key = '0000000000000000';     $n_key_long = $this->_str2long(0, $key, $key_long);     $data = '';    $w  = array(0, 0);    $j  = 0;    $len = 0;    $k  = array(0, 0, 0, 0);    $pos = 0;     for ($i = 0; $i < $n_enc_data_long; $i += 2) {     if ($j + 4 <= $n_key_long) {      $k[0] = $key_long[$j];      $k[1] = $key_long[$j + 1];      $k[2] = $key_long[$j + 2];      $k[3] = $key_long[$j + 3];     } else {      $k[0] = $key_long[$j % $n_key_long];      $k[1] = $key_long[($j + 1) % $n_key_long];      $k[2] = $key_long[($j + 2) % $n_key_long];      $k[3] = $key_long[($j + 3) % $n_key_long];     }     $j = ($j + 4) % $n_key_long;      $this->_decipherLong($enc_data_long[$i], $enc_data_long[$i + 1], $w, $k);      if (0 == $i) {      $len = $w[0];      if (4 <= $len) {       $data .= $this->_long2str($w[1]);      } else {       $data .= substr($this->_long2str($w[1]), 0, $len % 4);      }     } else {      $pos = ($i - 1) * 4;      if ($pos + 4 <= $len) {       $data .= $this->_long2str($w[0]);        if ($pos + 8 <= $len) {        $data .= $this->_long2str($w[1]);       } elseif ($pos + 4 < $len) {        $data .= substr($this->_long2str($w[1]), 0, $len % 4);       }      } else {       $data .= substr($this->_long2str($w[0]), 0, $len % 4);      }     }    }    return $data;   }    function _encipherLong($y, $z, &$w, &$k)   {    $sum = (integer) 0;    $delta = 0x9E3779B9;    $n  = (integer) $this->n_iter;     while ($n-- > 0) {     $y  = $this->_add($y,          $this->_add($z << 4 ^ $this->_rshift($z, 5), $z) ^           $this->_add($sum, $k[$sum & 3]));     $sum = $this->_add($sum, $delta);     $z  = $this->_add($z,          $this->_add($y << 4 ^ $this->_rshift($y, 5), $y) ^           $this->_add($sum, $k[$this->_rshift($sum, 11) & 3]));    }     $w[0] = $y;    $w[1] = $z;   }    function _decipherLong($y, $z, &$w, &$k)   {    $sum = 0xC6EF3720;    $delta = 0x9E3779B9;    $n  = (integer) $this->n_iter;     while ($n-- > 0) {     $z  = $this->_add($z,          -($this->_add($y << 4 ^ $this->_rshift($y, 5), $y) ^            $this->_add($sum, $k[$this->_rshift($sum, 11) & 3])));     $sum = $this->_add($sum, -$delta);     $y  = $this->_add($y,          -($this->_add($z << 4 ^ $this->_rshift($z, 5), $z) ^            $this->_add($sum, $k[$sum & 3])));    }     $w[0] = $y;    $w[1] = $z;   }    function _resize(&$data, $size, $nonull = false)   {    $n  = strlen($data);    $nmod = $n % $size;    if ( 0 == $nmod )     $nmod = $size;     if ($nmod > 0) {     if ($nonull) {      for ($i = $n; $i < $n - $nmod + $size; ++$i) {       $data[$i] = $data[$i % $n];      }     } else {      for ($i = $n; $i < $n - $nmod + $size; ++$i) {       $data[$i] = chr(0);      }     }    }    return $n;   }    function _hex2bin($str)   {    $len = strlen($str);    return pack('H' . $len, $str);   }    function _str2long($start, &$data, &$data_long)   {    $n = strlen($data);     $tmp = unpack('N*', $data);    $j  = $start;     foreach ($tmp as $value)     $data_long[$j++] = $value;     return $j;   }    function _long2str($l)   {    return pack('N', $l);   }    function _rshift($integer, $n)   {    if (0xffffffff < $integer || -0xffffffff > $integer) {     $integer = fmod($integer, 0xffffffff + 1);    }     if (0x7fffffff < $integer) {     $integer -= 0xffffffff + 1.0;    } elseif (-0x80000000 > $integer) {     $integer += 0xffffffff + 1.0;    }     if (0 > $integer) {     $integer &= 0x7fffffff;     $integer >>= $n;     $integer |= 1 << (31 - $n);    } else {     $integer >>= $n;    }     return $integer;   }    function _add($i1, $i2)   {    $result = 0.0;     foreach (func_get_args() as $value) {     if (0.0 > $value) {      $value -= 1.0 + 0xffffffff;     }      $result += $value;    }     if (0xffffffff < $result || -0xffffffff > $result) {     $result = fmod($result, 0xffffffff + 1);    }     if (0x7fffffff < $result) {     $result -= 0xffffffff + 1.0;    } elseif (-0x80000000 > $result) {     $result += 0xffffffff + 1.0;    }    return $result;   }  }  ?> 使用方法參考如下：// 加密過程view sourceprint? $text_file = S_ROOT . './456.php';  $str = @file_get_contents($text_file);   require_once S_ROOT . "./text_auth.php";  $text_auth = new text_auth(64);   $str = $text_auth->encrypt($str, "qianyunlai.com");   $filename = S_ROOT . './789.php'; // 加密后的文本為二進制，普通的文本編輯器無法正常查看  file_put_contents($filename, $str); // 解密過程view sourceprint?01 $text_file = S_ROOT . './789.php';  $str = @file_get_contents($text_file);   require_once S_ROOT . "./text_auth.php";  $text_auth = new text_auth(64);   $str = $text_auth->decrypt($str, "qianyunlai.com");   $filename = S_ROOT . './456.php';  file_put_contents($filename, $str);