本文实例讲述了PHP实现的加密解密处理类。分享给大家供大家参考，具体如下：
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<?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) ? 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) ? 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?> |
希望本文所述对大家PHP程序设计有所帮助。
