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°£ÆíURL http://phpschool.com/link/qna_other/123570 º¹»ç

SyntaxHighlight·Î º¸±â

´äº¯Ã¤ÅÃÀ² 100 %
<?
 function calcxor($str,$key)
 {
  $str_max=strlen($str);
  $key_max=strlen($key);
  $tmp='';
  for($i=0;$i<$str_max;$i++)
  $tmp.=$str{$i}^$key{$i%$key_max};
  return $tmp;
 }
//¾Ïȣȭ
 function with_encode($str,$key)
 {
  $tmp=calcxor($str,$key);
  $tmp_max=strlen($tmp);
  $enc='';
  for($i=0;$i<$tmp_max;$i++)
  $enc.=sprintf('%02x',ord($tmp{$i}));
  return $enc;
 }

//º¹È£È­
 function with_decode($str,$key)
 {
  $tmp='';
  for($i=0;$i<strlen($str);$i+=2)
  $tmp.=chr(hexdec($str{$i}.$str{$i+1}));
  return calcxor($tmp,$key);
 }
?>

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