What's the sequence? How to decode?

Question

Programming

5779f6fcd2a5d
577b4bcbb0bc9
577ca2aadc9c7
5774ca2362c64
5774c7ebc9193
5773764b3b753
5770d7fa7b589
576f6fc74158a

Answer 1

I suspect that:

<?php
echo uniqid();

https://secure.php.net/manual/ru/function.uniqid.php
All you can get from it is a timestamp:

<?php
$list = [
  '5779f6fcd2a5d',
  '577b4bcbb0bc9',
  '577ca2aadc9c7',
  '5774ca2362c64',
  '5774c7ebc9193',
  '5773764b3b753',
  '5770d7fa7b589',
  '576f6fc74158a',
];
foreach ($list as $id) {
  $timestamp = hexdec( substr($id, 0, 8) );
  echo date('Y-m-d H:i:s', $timestamp) . '<br>';
}

conclusion:

2016-07-04 01:41:16
2016-07-05 01:55:23
2016-07-06 02:18:18
2016-06-30 03:28:35
2016-06-30 03:19:07
2016-06-29 03:18:35
2016-06-27 03:38:34
2016-06-26 02:01:43

The remaining characters are microtime . Proof:

<?php
//$id = '5779f6fcd2a5d';
$id = uniqid();

$timestamp = hexdec( substr($id, 0, 8) );
$microtime = hexdec( substr($id, 8) );

echo '0.' . $microtime . '00 ' . $timestamp . '<br>';
echo microtime();

Answer 2

Not knowing the method of "encryption" - no way. Just guess. Even knowing the method - there is a chance that nothing.