海运的博客

<?php
   function url_base64_encode($string) {
      $data = base64_encode($string);
      $data = str_replace(array('+','/','='),array('-','_',''),$data);
      return $data;
   }

   function url_base64_decode($string) {
      $data = str_replace(array('-','_'),array('+','/'),$string);
      $mod4 = strlen($data) % 4;
      if ($mod4) {
         $data .= substr('====', $mod4);
      }
      return base64_decode($data);
   }

   function encrypt($key, $str) {   
      $iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128,MCRYPT_MODE_ECB),MCRYPT_DEV_URANDOM);
      $str_encrypt = mcrypt_encrypt(MCRYPT_RIJNDAEL_128,$key,$str,MCRYPT_MODE_ECB,$iv);
      return trim(url_base64_encode($str_encrypt));   
   }   

   function decrypt($key, $str_encrypt) {   
      $str_encrypt = trim(url_base64_decode($str_encrypt));   
      $iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128,MCRYPT_MODE_ECB),MCRYPT_DEV_URANDOM);
      $str_decrypt = mcrypt_decrypt(MCRYPT_RIJNDAEL_128,$key,$str_encrypt,MCRYPT_MODE_ECB,$iv);
      return trim($str_decrypt);
   }
   echo encrypt('key','http://www.baidu.com////aaaa/bbbb/ccd//ddd')."\n";
   echo decrypt('key','zPsrxzCmqAAvlLwv4E7AlI346XTbaw1hAOoPZhtD3sKw__EIxmWpyHTEp4u2skGM')."\n";

?>

标签：php