optimus: What's wrong?

Hi. Using the example numbers:

$optimus = new Jenssegers\Optimus\Optimus(1580030173, 59260789, 1163945558);

$id = "1000000000"; //10 digits
$encoded = $optimus->encode($id);
$original = $optimus->decode($encoded);
print_r(array($id, $encoded, $original), true); 
// ["1000000000", 1768948822, 1000000000]

$id = "10000000000"; //11 digits
$encoded = $optimus->encode($id);
$original = $optimus->decode($encoded);
print_r(array($id, $encoded, $original), true); 
// ["10000000000", 2109978198, 856559616]


$id = "100000000000"; //12 digits
$encoded = $optimus->encode($id);
$original = $optimus->decode($encoded);
print_r(array($id, $encoded, $original), true); 
// ["100000000000", 1163945558, 0]

My IDs are MySQL’s bigint that can be 20 digits long! Optimus is not for me? What am I missing? There is a length limit?

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uname -a Linux picard 2.6.32-74-server #142-Ubuntu SMP Tue Apr 28 10:12:19 UTC 2015 x86_64 GNU/Linux

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I had to change line 108 at src/Optimus.php to get it working:

if (! in_array($mode, [static::MODE_GMP, static::MODE_NATIVE])) {

to

if (! in_array($mode, array(static::MODE_GMP, static::MODE_NATIVE)) ) {

Thanks in advance.