Home > php教程 > php手册 > body text

PHP实现加强版加密解密类实例,加强版加密解密

WBOY
Release: 2016-06-13 08:57:10
Original
838 people have browsed it

PHP实现加强版加密解密类实例,加强版加密解密

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:

<&#63;php
class Ender{
  private $enkey;//加密解密用的密钥
  private $rep_char='#';
  //替换加密后的base64字符串中的=,因为=在有些场合是禁止使用的,
  //这里可以用一个允许的字符作为替换。
  //构造参数是密钥
  public function __construct($key=''){
    if(!$key){
      $this->enkey=$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;$i<strlen($txt);$i++) 
  { 
  if ($ctr==strlen($encrypt_key)) $ctr=0; 
  $tmp.= substr($txt,$i,1) ^ substr($encrypt_key,$ctr,1); 
  $ctr++; 
  } 
  return $tmp;
  }
  //加密字符串
  public function encrypt($txt,$key='') 
  {
  if(!$key){
    $key=$this->enkey;
  }
  srand((double)microtime()*1000000); 
  $encrypt_key = md5(rand(0,32000)); 
  $ctr=0; 
  $tmp = ""; 
  for ($i=0;$i<strlen($txt);$i++) 
  { 
  if ($ctr==strlen($encrypt_key)) $ctr=0; 
  $tmp.= substr($encrypt_key,$ctr,1) . 
  (substr($txt,$i,1) ^ substr($encrypt_key,$ctr,1)); 
  $ctr++; 
  }
  $r=base64_encode($this->keyED($tmp,$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;$i<strlen($txt);$i++) 
  { 
  $md5 = substr($txt,$i,1); 
  $i++; 
  $tmp.= (substr($txt,$i,1) ^ $md5); 
  } 
  return $tmp; 
  }
}

Copy after login

希望本文所述对大家的php程序设计有所帮助。

Related labels:
source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Recommendations
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template
About us Disclaimer Sitemap
php.cn:Public welfare online PHP training,Help PHP learners grow quickly!