PHP calculate date range from array - php

Question

I use service API which provide a schedule in json in format describes date ranges:
.... // Other items
{
"registration": "SP-TEST",
"records": [
{
"from": "2014-12-06T13:40Z",
"available": true
},
{
"from": "2014-12-07T14:30Z",
"available": false
},
{
"from": "2014-12-13T14:30Z",
"available": true
},
{
"from": "2014-12-13T16:30Z",
"available": false
},
{
"from": "2014-12-15T14:30Z",
"available": true
}
]
},
....
But it uncomfortable for use and search. I need import it to MySQL DB and perform search in date range where is available, so I need combine arrays something like:
[{
"registration": "SP-TEST",
"from": "2014-12-06T13:40Z",
"to": "2014-12-07T14:30Z"
},
{
"registration": "SP-TEST",
"from": "2014-12-13T14:30Z",
"to": "2014-12-13T16:30Z"
},
{
"registration": "SP-TEST",
"from": "2014-06-06T13:40Z",
"to": "2014-06-07T14:30Z"
},
{
"registration": "SP-TEST",
"from": "2014-12-15T14:30Z",
"to": "2014-02-07T14:30Z"
}]
I use usort function to sort by time source array (json_decode($schedule)):
usort($schedule->records, function($a, $b) {
return strtotime($a->from) - strtotime($b->from);
});
So, if this code is correct I can use foreach to populate new array, but it does not work, because a little problem: "records" can contain just one record. It can have "available": true or "available": false, which means that it available or not from current date up 2 month.
Maybe somebody prompts me a right way?

Answer 1

Resolved. Sort by date, then foreach.
function schedule($records) {
date_default_timezone_set('UTC'); // 0 timezone
$result = array();
foreach ($records as $k => $v) {
$record = array_merge($record, array(
'available' => $v->available,
'location' => $v->location,
'from' => $v->from,
'depart' => '',
'arrive' => '',
'to'=> date("Y-m-d\TH:i\Z", strtotime("+2 month", strtotime($v->from)))
));
if (count($records) > 1) {
$record['to'] = date("Y-m-d\TH:i\Z", strtotime("+2 month", strtotime($record['from'])));
}
if (isset($records[$k+1])) {
$record['to'] = $records[$k+1]->from;
$record['depart'] = $v->location;
$record['arrive'] = $records[$k+1]->location;
}
$result[] = $record;
}
return $result;
}