PHP - Auto calculate time intervals in laravel - php

Question

I have three columns in my table start_time, end_time and interval.
The start_time and end_time stores time like 22:00 and 24:00 respectively and the interval store time like 00:15:00.
What I want to do is auto calculate intervals like 22:00 - 22:15, 22:15 - 22:30 and so on till 23:45 - 24:00.
And if the interval is 00:30:00 the intervals should be 22:00 - 22:30.
I'm new to laravel and stackoverflow so sorry for any inconvenience.

Answer 1

You can use for loop together with strtotime.
$start= "20:00";
$end = "22:00";
$int = 15;
$int *= 60;
$start = strtotime($start);
$end = strtotime($end);
for($i = $start; $i < $end;){
$res[] = date("H:i", $i) . "-" . date("H:i", $i + $int);
$i += $int;
}
var_dump($res);
https://3v4l.org/I2lUS
EDIT; didn't notice you wanted a different output

Answer 2

<?php
$begin = new DateTimeImmutable('19:00');
$end = new DateTimeImmutable('24:30'); // Last 30 min will not be inclued (see output)
$interval = new DateInterval('PT30M'); // Interval 30 min
$daterange = new DatePeriod($begin, $interval ,$end);
$ranges = [];
foreach ($daterange as $key => $range) {
$ranges[$key] = $range->format('H:i');
if($key>0) {
$ranges[$key-1] .= ' - '.$range->format('H:i');
}
}
array_pop($ranges);
print_r($ranges);
Output:
Array
(
[0] => 19:00 - 19:30
[1] => 19:30 - 20:00
[2] => 20:00 - 20:30
[3] => 20:30 - 21:00
[4] => 21:00 - 21:30
[5] => 21:30 - 22:00
[6] => 22:00 - 22:30
[7] => 22:30 - 23:00
[8] => 23:00 - 23:30
[9] => 23:30 - 00:00
)