Find recent and upcoming dates - php

Question

I have a two-dimensional array containing events and dates:
$events = array(
array('event' => 'event1', 'date' => '2016-05-05'),
array('event' => 'event2', 'date' => '2016-05-08'),
array('event' => 'event3', 'date' => '2016-05-08'),
array('event' => 'event4', 'date' => '2016-05-10'),
array('event' => 'event5', 'date' => '2016-05-10'),
array('event' => 'event6', 'date' => '2016-05-11'),
array('event' => 'event7', 'date' => '2016-05-11'),
array('event' => 'event8', 'date' => '2016-05-13')
};
Let's say today is 2016-05-10 and I want to create 3 new arrays:
$recent - all events happened on the previous available day
$today - all events today
$upcoming - all events happening on the next available day
$today is easy:
$today = array();
for($i = 0; $i < count($events); ++$i) {
if($events[$i]['date'] == date("Y-m-d") {
array_push($today, $events[$i]['event']);
}
}
So, I will need $recent to contain event2 and event3, and $upcoming to contain event6 and event7.
The question is how to find the recent and the upcoming ones.
*Clarification:
I don't want all the events in $recent happened before today, but the events happened on the previous available day. So in this case only events happened on 2016-05-08

Answer 1

// Take all dates from source array
$dates = array_unique(array_map(function ($i) { return strtotime($i); } , array_column($events, 'date')));
sort($dates);
$today = strtotime('midnight');
// find previouse date. It will be 1970-1-1 if not present in array
$prev = #max(array_filter($dates, function($i) use($today) { return $i < $today; }));
// find туче date. It will be 1970-1-1 if not present in array
$next = #min(array_filter($dates, function($i) use($today) { return $i > $today; }));
$prev = date('Y-m-d', $prev);
$next = date('Y-m-d', $next);
// fill arrays
$recent = array();
$upcoming = array();
$today = array();
for($i = 0; $i < count($events); ++$i) {
if($events[$i]['date'] == date('Y-m-d')) {
array_push($today, $events[$i]['event']);
}
if($events[$i]['date'] == $prev) {
array_push($recent, $events[$i]['event']);
}
if($events[$i]['date'] == $next) {
array_push($upcoming , $events[$i]['event']);
}
}

Answer 2

Try with creating three (3) blank array, check the date is greater or less than today or not and push into array according to conditions.
$today = array();
$upcoming = array();
$recent = array();
$thisDay = date("Y-m-d");
$count = count($events);
$max = max(array_column($events, 'date'));
$min = min(array_column($events, 'date'));
for($i = 0; $i < $count; $i++){
if($events[$i]['date'] > $thisDay){
$max = ($max > $events[$i]['date']) ? $events[$i]['date'] : $max;
array_push($upcoming, $events[$i]['event']);
array_push($upcoming_dates, $events[$i]['date']);
}
elseif($events[$i]['date'] < $thisDay){
$min = ($min < $events[$i]['date']) ? $events[$i]['date'] : $min;
array_push($recent, $events[$i]['event']);
array_push($recent_dates, $events[$i]['date']);
}
else
array_push($today, $events[$i]['event']);
}
foreach($recent_dates as $key => $value){
if($value != $min)
unset($recent[$key]);
}
foreach($upcoming_dates as $key => $value){
if($value != $max)
unset($upcoming[$key]);
}
echo '<pre>';
print_r($today);
print_r($upcoming);
print_r($recent);
Result
Today:
Array
(
[0] => event4
[1] => event5
)
Upcoming:
Array
(
[0] => event6
[1] => event7
)
Recent:
Array
(
[1] => event2
[2] => event3
)
Note: You use push_array which is not any library function in PHP. For Re-index of recent and upcoming you can use array_values.

Answer 3

Another solution should be
$recent = array();
$upcoming = array();
$today = array();
$all_dates = array();
foreach ($events as $event):
array_push($all_dates, $event['date']);
endforeach;
if ($key = array_search('2016-05-10', $all_dates)) {
$prev_date = $all_dates[$key - 1];
}
for ($i = 0; $i < count($all_dates); $i++) {
if ($all_dates[$i] > $all_dates[$key]) {
$next_date = $all_dates[$i + 1];
break;
}
}
for ($i = 0; $i < count($events); ++$i) {
if ($events[$i]['date'] == date('Y-m-d')) {
array_push($today, $events[$i]['event']);
}
if ($events[$i]['date'] == $prev_date) {
array_push($recent, $events[$i]['event']);
}
if ($events[$i]['date'] == $next_date) {
array_push($upcoming, $events[$i]['event']);
}
}
echo '<pre>';
print_r($upcoming);
print_r($today);
print_r($recent);
Output will be
Array
(
[0] => event6
[1] => event7
)
Array
(
[0] => event4
[1] => event5
)
Array
(
[0] => event2
[1] => event3
)