PHP Cryptographic decryption Processing Class (code + usage) written by Discuz Forum

PHP encryption and decryption is often the case, recently in the related things, found Discuz forum PHP encryption and decryption processing class code, feel very good, in use, to refer to the Discuz forum passport-related functions, I will attach the use of the method, the first class code post:

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<?php/*========================================================= 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=========================================================*/class SysCrypt {private$crypt_key;// 构造函数publicfunction__construct($crypt_key) {   $this-> crypt_key = $crypt_key;}publicfunctionphp_encrypt($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) ? 0 : $ctr;    $tmp.= $encrypt_key[$ctr].($txt[$i]^$encrypt_key[$ctr++]);   }   returnbase64_encode(self::__key($tmp,$this-> crypt_key));}public functionphp_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;}privatefunction__key($txt,$encrypt_key) {   $encrypt_key= md5($encrypt_key);   $ctr= 0;   $tmp= ‘‘;   for($i= 0; $i< strlen($txt); $i++) {    $ctr= $ctr== strlen($encrypt_key) ? 0 : $ctr;    $tmp.= $txt[$i] ^ $encrypt_key[$ctr++];   }   return$tmp;}publicfunction__destruct() {   $this -> crypt_key = null;}}?>

We recommend that you save this type of file name: cls.sys_crypt.php

Instructions for how to use:

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<?php//使用前请先引入类文件，如：include‘cls.sys_crypt.php‘;$sc= newSysCrypt(‘phpwms‘);$text= ‘110‘;print($sc-> php_encrypt($text));print(‘<br>‘);print($sc-> php_decrypt($sc-> php_encrypt($text)));?>

This article title: Discuz Forum Write the PHP encryption and decryption processing class (code + use method)
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PHP Cryptographic decryption Processing Class (code + usage) written by Discuz Forum