一段可以对数字型字符串进行简单的加密与解密的代码,有需要的朋友,可以参考下。
代码如下: <?php /** * 数字型字符串简单加密码与解密 * site bbs.it-home.org */ class Encryption { /** * 最终的密文代码,可设为任意不重复的10位英文字符a-zA-Z */ private $replacement = 'urskydMeIV'; /** * 增加的密文第一位,可设为1位除0以外的整数,即 1-9 */ private $prefix = "8"; /** * 公钥,长度小于8位的正整数 */ private $match = "111111"; /** * 转换后对照数组 */ private $replaceenc; private $replacedec; function __construct() { for($i =0; $i < 10; $i++) { $this->replaceenc['/'.$i.'/'] = $this->replacement{$i}; $this->replacedec['/'.$this->replacement{$i}.'/'] = $i; } } public function encrypt($str) { return preg_replace( array_keys($this->replaceenc), $this->replaceenc, $this->mynotin(preg_replace("/(.)(.)/", "${2}$软件HR", $str)) ); } public function decrypt($str) { return preg_replace("/(.)(.)/", "${2}$软件HR", $this->mynotout(preg_replace(array_keys($this->replacedec),$this->replacedec,$str)) ); } private function mynotin($str) { $str_out = ""; $i = 0; while(isset($str{7*$i})) { $str_out .= (($this->prefix.substr($str, $i*7, 7))+0)^$this->match; $i++; } return $str_out; } private function mynotout($str) { $str_out = ""; $i = 0; while(isset($str{8*$i})) { $str_out .= substr((substr($str, $i*8, 8)+0)^$this->match, 1); $i++; } return $str_out; } } ?> |