PHP实现加强版加密解密类实例

本文实例讲述了PHP实现加强版加密解密类。分享给大家供大家参考。具体如下：

enkey=$key;
    }
  }
  //设置密钥http://blog.ddian.cn
  public function set_key($key){
    $this->enkey=$key;
  }
  private function keyED($txt,$encrypt_key) 
  { 
  $encrypt_key = md5($encrypt_key); 
  $ctr=0; 
  $tmp = ""; 
  for ($i=0;$ienkey;
  }
  srand((double)microtime()*1000000); 
  $encrypt_key = md5(rand(0,32000)); 
  $ctr=0; 
  $tmp = ""; 
  for ($i=0;$ikeyED($tmp,$key));
  $r=str_replace('=',$this->rep_char,$r);
  return $r; 
  }
  //解密字符串
  public function decrypt($txt,$key='') 
  {
  $txt=str_replace($this->rep_char,'=',$txt);
  $txt=base64_decode($txt);
  if(!$key){
      $key=$this->enkey;
  }
  $txt = $this->keyED($txt,$key); 
  $tmp = ""; 
  for ($i=0;$i

希望本文所述对大家的php程序设计有所帮助。