PHP给源代码加密的几种方法汇总(推荐)

虽说分享是传统的美德，但我们有时候辛辛苦苦写一些程序只是为了卖点小钱，挣点辛苦费，也防止有些没有道德的人倒卖，所以我们不得不对我们的程序进行加密，以下我们来介绍一下如何通过PHP的自定义函数来加密我们的PHP源代码。

第一个方法

<?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 并且可写 则进行压缩编码
   $contents = file_get_contents($filename); // 判断文件是否已经被编码处理
   $contents = php_strip_whitespace($filename); 

   // 去除PHP头部和尾部标识
   $headerPos = strpos($contents,'<?php');
   $footerPos = strrpos($contents,'?>');
   $contents = substr($contents, $headerPos + 5, $footerPos - $headerPos);
   $encode = base64_encode(gzdeflate($contents)); // 开始编码
   $encode = '<?php'."\n eval(gzinflate(base64_decode("."'".$encode."'".")));\n\n?>"; 

   return file_put_contents($filename, $encode);
  }
  return false;
 } 

 //调用函数
 $filename = 'dam.php';
 encode_file_contents($filename);
 echo "OK,加密完成！"
 ?>

第二个方法

<?php 

 function RandAbc($length = "") { // 返回随机字符串
  $str = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
  return str_shuffle($str);
 } 

 $filename = 'index.php'; //要加密的文件
 $T_k1 = RandAbc(); //随机密匙1
 $T_k2 = RandAbc(); //随机密匙2
 $vstr = file_get_contents($filename);
 $v1 = base64_encode($vstr);
 $c = strtr($v1, $T_k1, $T_k2); //根据密匙替换对应字符。
 $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('写文件错误'); 

 ?>

第三个方法

<?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;
  }
 }
 ?>
使用方法参考如下：
// 加密过程
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"); 

 $filename = S_ROOT . './789.php'; // 加密后的文本为二进制，普通的文本编辑器无法正常查看
 file_put_contents($filename, $str);
// 解密过程
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);

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