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
 /*===========================================================
 = 版權(quán)協(xié)議：
 = GPL (The GNU GENERAL PUBLIC LICENSE Version 2, June 1991)
 =------------------------------------------------------------
 = 文件名稱：cls.sys_crypt.php
 = 摘  要：php加密解密處理類
 = 版  本：1.0
 = 參  考：Discuz論壇的passport相關(guān)函數(shù)
 =------------------------------------------------------------
 = 最后更新日期：2007-12-09
 ============================================================*/
 class SysCrypt {
 private $crypt_key;
 // 構(gòu)造函數(shù)
 public function __construct($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;
 }
 }
 //執(zhí)行代碼
 $sc = new SysCrypt('phpwms');
 $text = 'abc10000008910000000990099hh'; //需要加密的數(shù)據(jù)
 print($sc -> php_encrypt($text)); //加密
 print('<br>');
 print($sc -> php_decrypt($sc -> php_encrypt($text))); //解密
&#63;>

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Password security online detection

Strong Password Generator

MD5 online encryption tool

Thunlei, Kuaiche, Tornado URL encryption/decryption tools

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