PHP加密类

来源：互联网发布：美国旅游知乎编辑：程序博客网时间：2024/05/18 00:15

<?php
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;
}
}
$sc = new SysCrypt('phpwms');
$text = 'aBcDeFg你好';
echo $text = $sc->php_encrypt($text);
echo '<br>';
echo $text = $sc->php_decrypt($text);
echo '<br>';
?>