How to prevent php source code from being cracked

Protect your own PHP code and encrypt it:

Code Obfuscation Encryption

Actual encryption does not count. The specific implementation idea is to base64 encrypt the code, then perform string mapping on the string in base64 (randomly generate dictionary obfuscation), and then eval executes this method, which can be cracked and restored (recommended learning: PHP video tutorial)

represents the code as follows:

<?php

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

 $filename = &#39;index.php&#39;; //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"; 
 $s = &#39;$&#39;.$q6.&#39;=urldecode("%6E1%7A%62%2F%6D%615%5C%76%740%6928%2D%70%78%75%71%79%2A6%6C%72%6B%64%679%5F%65%68%63%73%77%6F4%2B%6637%6A");$&#39;.$q1.&#39;=$&#39;.$q6.&#39;{3}.$&#39;.$q6.&#39;{6}.$&#39;.$q6.&#39;{33}.$&#39;.$q6.&#39;{30};$&#39;.$q3.&#39;=$&#39;.$q6.&#39;{33}.$&#39;.$q6.&#39;{10}.$&#39;.$q6.&#39;{24}.$&#39;.$q6.&#39;{10}.$&#39;.$q6.&#39;{24};$&#39;.$q4.&#39;=$&#39;.$q3.&#39;{0}.$&#39;.$q6.&#39;{18}.$&#39;.$q6.&#39;{3}.$&#39;.$q3.&#39;{0}.$&#39;.$q3.&#39;{1}.$&#39;.$q6.&#39;{24};$&#39;.$q5.&#39;=$&#39;.$q6.&#39;{7}.$&#39;.$q6.&#39;{13};$&#39;.$q1.&#39;.=$&#39;.$q6.&#39;{22}.$&#39;.$q6.&#39;{36}.$&#39;.$q6.&#39;{29}.$&#39;.$q6.&#39;{26}.$&#39;.$q6.&#39;{30}.$&#39;.$q6.&#39;{32}.$&#39;.$q6.&#39;{35}.$&#39;.$q6.&#39;{26}.$&#39;.$q6.&#39;{30};eval($&#39;.$q1.&#39;("&#39;.base64_encode(&#39;$&#39;.$q2.&#39;="&#39;.$c.&#39;";eval(\&#39;?>\&#39;.$&#39;.$q1.&#39;($&#39;.$q3.&#39;($&#39;.$q4.&#39;($&#39;.$q2.&#39;,$&#39;.$q5.&#39;*2),$&#39;.$q4.&#39;($&#39;.$q2.&#39;,$&#39;.$q5.&#39;,$&#39;.$q5.&#39;),$&#39;.$q4.&#39;($&#39;.$q2.&#39;,0,$&#39;.$q5.&#39;))));&#39;).&#39;"));&#39;; 

 $s = &#39;<?php &#39;."\n".$s."\n".&#39; ?>&#39;; 
 //echo $s; 
 // 生成 加密后的PHP文件 
 $fpp1 = fopen(&#39;temp_&#39;.$filename, &#39;w&#39;); 
 fwrite($fpp1, $s) or die(&#39;写文件错误&#39;); 

 ?>

Distribute opcode

Do not distribute the code, Instead, precompile the PHP code first and distribute the opcode. After PHP7, opcache is deeply integrated with this thing. After PHP7, you can use this method to protect the source code, but it will also be decompiled back by the opcode and will be cracked.

Write PHP extensions with obfuscation and encryption

Write PHP extensions with obfuscation and encryption, but any open source PHP extension will be cracked unless you write your own encryption algorithm and encrypt the PHP code , and then use the C voice to write extended closed source. Others don’t know your encryption and cracking ideas, so the possibility of being cracked is very small.

Swoole Compiler

The one produced by swoole is to take the generated opcode and then obfuscate the encryption. Then this is awesome. If you want to execute this, it is obvious that the zend engine is It is impossible to recognize the obfuscated and encrypted opcode, so he actually needs to rewrite zend, so the supporting zend engine also needs to be changed.

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