一个简单的php加密解密函数(动态加密)

这篇文章主要为大家详细介绍了一个简单的php加密解密函数(动态加密)，具有一定的参考价值，可以用来参考一下。

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代码如下:

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

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