代码如下:
class SysCrypt{
private $crypt_key='https://www.jb51.net';//密钥
public function __construct($crypt_key){
$this->crypt_key=$crypt_key;
}
public function 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,$this->crypt_key));
}
public function decrypt($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;
}
}
该类使用方法:
代码如下:
$sc=new SysCrypt('https://www.jb51.net');
$text='yhm.1234@163.com';
$test1=$sc->encrypt($text);
echo '原文:',$text;
echo '<br />';
echo '密文:',$test1;
echo "<br/>";
echo '解密:',$sc->decrypt($test1);
输出结果类似:
原文:yhm.1234@163.com
密文:BS8DbFU6AioCNFFlVGZQMgRGBDUOYlEzBXoAZgo0Bjk=
解密:yhm.1234@163.com