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PHP-simple symmetric encryption algorithm and conversion function between string and hexadecimal

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2016-08-08 09:26:541134browse

/**
* Encryption using simple symmetric encryption algorithm
* @param String $string The string that needs to be encrypted
* @param String $skey Encryption EKY
* @return String
*/
function encode($string = '', $skey = 'textphp') {
  $skey = str_split(base64_encode($skey));
  $strArr = str_split(base64_encode($string));
  $strCount = count($strArr);
  foreach ($skey as $key => $value) {
    $key < $strCount && $strArr[$key].=$value;
  }
  return str_replace('=', 'O0O0O', join('', $strArr));
}

/**
* Decryption of simple symmetric encryption algorithm
* @param String $string The string to be decrypted
* @param String $skey Decryption KEY
* @return String
*/
function decode($string = '', $skey = 'textphp') {
  $skey = str_split(base64_encode($skey));
  $strArr = str_split(str_replace('O0O0O', '=', $string), 2);
  $strCount = count($strArr);
  foreach ($skey as $key => $value) {
    $key < $strCount && $strArr[$key][1] === $value && $strArr[$key] = $strArr[$key][0];
  }
  return base64_decode(join('', $strArr));
}

//字符串转换成16进制
function str2hex($str, $encoded = 'GBK') {
  $hex = '';
  if ($encoded == 'GBK') {
    $str = mb_convert_encoding($str, 'GBK', 'UTF-8');
  }
  for ($i = 0, $length = mb_strlen($str); $i < $length; $i++) {
    $hex .= dechex(ord($str{$i}));
  }
  return $hex;
}

//16进制转换成字符串
function hex2str($hex, $encoded = 'GBK') {
  $str = '';
  $arr = str_split($hex, 2);
  foreach ($arr as $bit) {
    $str .= chr(hexdec($bit));
  }
  if ($encoded == 'GBK') {
    $str = mb_convert_encoding($str, 'UTF-8', 'GBK');
  }
  return $str;
}

以上就介绍了php-简单对称加密算法和字符串与十六进制之间的互转函数,包括了方面的内容,希望对PHP教程有兴趣的朋友有所帮助。

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