how can I create a list of times in php? - php

Question

I have x.
x is minutes.
I have a string start_time like: 7:00
And I have a string end_time like: 14:00
how can print a list of time with increase x minutes for each loop?
I want print something like this:
if x = 30
7:00 - 7:30
7:30 - 8:00
...
13:30 - 14:00
I try do it with math functions in php like this:
$time = '7:00';
$mm = $hh = 0;
$str = explode(":",$time);
if(($str[1]+ $x) > 60)
{
...
}
but it there a more simple method? can date function in php do it?

Answer 1

You can use DatePeriod together with DateInterval to achieve this.
Create two DateTime intervals with your start and end times, and a DateInterval instance with the number of minutes you need. Then, create a DatePeriod with this information, and iterate over it to show the resulting times:
<?php
$minutes = 15;
$start = "07:00";
$end = "14:00";
$startDate = DateTime::createFromFormat("H:i", $start);
$endDate = DateTime::createFromFormat("H:i", $end);
$interval = new DateInterval("PT".$minutes."M");
$dateRange = new DatePeriod($startDate, $interval, $endDate);
foreach ($dateRange as $date) {
echo $date->format("H:i")."<br>";
}
Demo
Result
07:00
07:15
07:30
07:45
08:00
08:15
08:30
08:45
09:00
09:15
09:30
09:45
10:00
10:15
// etc

Answer 2

You can use the DatePeriod object along with a desired DateInterval object.
Example: https://3v4l.org/lg8QW
$start = new \DateTime('07:00');
$end = new \DateTime('14:00');
$interval = new \DateInterval('PT1M'); //change to desired interval
$periods = new \DatePeriod($start, $interval, $end);
foreach ($periods as $period) {
echo $period->format('H:i') ;
}
Result:
07:00
07:01
07:02
07:03
07:04
07:05
07:06
07:07
07:08
07:09
07:10
07:11
07:12
07:13
07:14
07:15
07:16
07:17
07:18
07:19
07:20
//...
13:59

Answer 3

You can use DateTime object.
just like this:
<?php
$start_time = '7:00';
$date1 = DateTime::createFromFormat('H:i', $start_time);
$old = $start_time;
while (true) {
$date1->modify('+30 min');
echo $old . '-' . $date1->format('H:i').PHP_EOL;
$old = $date1->format('H:i');
if ($old == '14:00') {
break;
}
}
Output:
7:00-07:30
07:30-08:00
08:00-08:30
...
13:30-14:00
More info just see the manual here: DateTime