Eliminate timestamps within a range from array - php

Question

This is my array of timestamps. I would like to eliminate values within 30 seconds of each other, only keeping the value if there is not another value within 30 sec. Any help would be greatly appreciated!
Array
(
[99999] => Array
(
[0] => 1356399000
[1] => 1356398971
[2] => 1356399005
[3] => 1356413406
)
[99997] => Array
(
[0] => 1356399002
[1] => 1356399007
[2] => 1356398871
[3] => 1356398876
)
[99996] => Array
(
[0] => 1356399003
[1] => 1356399004
[2] => 1356399008
)
[99995] => Array
(
[0] => 1356399009
)
)
My expected output:
Array
(
[99999] => Array
(
[0] => 1356399000
[1] => 1356398971
[2] => 1356413406
)
[99997] => Array
(
[0] => 1356399002
[1] => 1356398871
)
[99996] => Array
(
[0] => 1356399003
)
[99995] => Array
(
[0] => 1356399009
)
)
Any solutions/advice would be greatly appreciated! Thanks!

Answer 1

Your output is wrong .. because 1356398971 + 30 = 1356399001 which is grater than 1356399000 if i understand you clearly this i what it should look like
$data = array(
99999 => array(
0 => 1356399000,
1 => 1356398971,
2 => 1356399005,
3 => 1356413406,
),
99997 => array(
0 => 1356399002,
1 => 1356399007,
2 => 1356398871,
3 => 1356398876,
),
99996 => array(
0 => 1356399003,
1 => 1356399004,
2 => 1356399008,
),
99995 => array(
0 => 1356399009,
),
);
echo "<pre>";
$data = array_map(function ($values) {
rsort($values);
$ci = new CachingIterator(new ArrayIterator($values));
$values = array();
foreach ( $ci as $ts ) {
if ($ci->hasNext()) {
abs($ci->current() - $ci->getInnerIterator()->current()) > 30 and $values[] = $ts;
} else {
$values[] = $ts;
}
}
sort($values);
return $values;
}, $data);
print_r($data);
Output
Array
(
[99999] => Array
(
[0] => 1356398971
[1] => 1356413406
)
[99997] => Array
(
[0] => 1356398871
[1] => 1356399002
)
[99996] => Array
(
[0] => 1356399003
)
[99995] => Array
(
[0] => 1356399009
)
)