一个简单的php加密解密函数(动态加密)

demo

Code:

1. function encode_pass($tex,$key,$type="encode"){
   
2. $chrArr=array('a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z',
   
3. 'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z',
   
4. '0','1','2','3','4','5','6','7','8','9');
   
5. if($type=="decode"){
   
6. if(strlen($tex)<14)return false;
   
7. $verity_str=substr($tex, 0,8);
   
8. $tex=substr($tex, 8);
   
9. if($verity_str!=substr(md5($tex),0,8)){
   
10. //完整性验证失败
    
11. return false;
    
12. }
    
13. }
    
14. $key_b=$type=="decode"?substr($tex,0,6):$chrArr[rand()%62].$chrArr[rand()%62].$chrArr[rand()%62].$chrArr[rand()%62].$chrArr[rand()%62].$chrArr[rand()%62];
    
15. $rand_key=$key_b.$key;
    
16. $rand_key=md5($rand_key);
    
17. $tex=$type=="decode"?base64_decode(substr($tex, 6)):$tex;
    
18. $texlen=strlen($tex);
    
19. $reslutstr="";
    
20. for($i=0;$i<$texlen;$i++){
    
21. $reslutstr.=$tex{$i}^$rand_key{$i%32};
    
22. }
    
23. if($type!="decode"){
    
24. $reslutstr=trim($key_b.base64_encode($reslutstr),"==");
    
25. $reslutstr=substr(md5($reslutstr), 0,8).$reslutstr;
    
26. }
    
27. return $reslutstr;
    
28. }
    
29. $psa=encode_pass("phpcode","taintainxousad");
    
30. echo $psa;
    
31. echo encode_pass($psa,"taintainxousad",'decode');

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