Encryption and decryption processing class implemented by PHP, encryption and decryption implemented by php_PHP tutorial

Encryption and decryption processing class implemented by PHP, encryption and decryption implemented by php

The example in this article describes the encryption and decryption processing class implemented by PHP. Share it with everyone for your reference, the details are as follows:

<&#63;php
 /*===========================================================
 = 版权协议：
 = GPL (The GNU GENERAL PUBLIC LICENSE Version 2, June 1991)
 =------------------------------------------------------------
 = 文件名称：cls.sys_crypt.php
 = 摘  要：php加密解密处理类
 = 版  本：1.0
 = 参  考：Discuz论坛的passport相关函数
 =------------------------------------------------------------
 = 最后更新日期：2007-12-09
 ============================================================*/
 class SysCrypt {
 private $crypt_key;
 // 构造函数
 public function __construct($crypt_key) {
  $this -> crypt_key = $crypt_key;
 }
 public function php_encrypt($txt) {
  srand((double)microtime() * 1000000);
  $encrypt_key = md5(rand(0,32000));
  $ctr = 0;
  $tmp = '';
  for($i = 0;$i<strlen($txt);$i++) {
   $ctr = $ctr == strlen($encrypt_key) &#63; 0 : $ctr;
   $tmp .= $encrypt_key[$ctr].($txt[$i]^$encrypt_key[$ctr++]);
  }
  return base64_encode(self::__key($tmp,$this -> crypt_key));
 }
 public function php_decrypt($txt) {
  $txt = self::__key(base64_decode($txt),$this -> crypt_key);
  $tmp = '';
  for($i = 0;$i < strlen($txt); $i++) {
   $md5 = $txt[$i];
   $tmp .= $txt[++$i] ^ $md5;
  }
  return $tmp;
 }
 private function __key($txt,$encrypt_key) {
  $encrypt_key = md5($encrypt_key);
  $ctr = 0;
  $tmp = '';
  for($i = 0; $i < strlen($txt); $i++) {
   $ctr = $ctr == strlen($encrypt_key) &#63; 0 : $ctr;
   $tmp .= $txt[$i] ^ $encrypt_key[$ctr++];
  }
  return $tmp;
 }
 public function __destruct() {
  $this -> crypt_key = null;
 }
 }
 //执行代码
 $sc = new SysCrypt('phpwms');
 $text = 'abc10000008910000000990099hh'; //需要加密的数据
 print($sc -> php_encrypt($text)); //加密
 print('<br>');
 print($sc -> php_decrypt($sc -> php_encrypt($text))); //解密
&#63;>

Friends who are interested in encryption and decryption can also refer to the online tools on this site:

Password security online detection

Strong Password Generator

MD5 online encryption tool

Thunlei, Kuaiche, Tornado URL encryption/decryption tools

For more PHP-related content, please check out the special topics on this site: "Summary of PHP Encryption Methods", "Summary of PHP Operations and Operator Usage", "Summary of PHP Network Programming Skills", "Introduction Tutorial on PHP Basic Syntax", "php Summary of skills for operating office documents (including word, excel, access, ppt)", "Summary of php date and time usage", "Introduction to php object-oriented programming tutorial", "Summary of php string (string) usage", "php mysql "Introduction to Database Operation Tutorial" and "Summary of Common PHP Database Operation Skills"

I hope this article will be helpful to everyone in PHP programming.

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