DateTime "diff" - php

Question

I think Time object is just a mess. I really never learn how they works.
I have an array with data: 09:00-09:20 and 12:30-13:00.
Now i like to calculate the time between 09:00-09:20.
So i break up the array:
$break_1_dur = $usr_breaks['skift_rast1'];
//returns: 09:00-09:20
I break up the string:
$break_1_start = substr($break_1_dur,0,5);
//returns: 09:00
$break_1_ends = substr($break_1_dur,6,5);
//returns: 09:20
And now i'll use DateTime diff to calculate the time:
$break_1_dur = $break_1_start->diff($break_1_ends);
I have tried to make strings to "DateTime" with:
$break_1_start = new DateTime();
How can i in a easy way calculate this?

Answer 1

This should work for you:
Here I first split your array into the following structure with array_map():
Array
(
[skift_rast1] => Array
(
[start] => 09:00
[end] => 09:20
)
[skift_rast2] => Array
(
[start] => 12:30
[end] => 13:00
)
)
The I loop through all $times and calculate the difference with creating DateTime objects and get the difference via diff():
<?php
$usr_breaks = ["skift_rast1" => "09:00-09:20", "skift_rast2" => "12:30-13:00"];
$times = array_map(function($v){
return array_combine(["start", "end"], explode("-", $v));
}, $usr_breaks);
//print differences
foreach($times as $time) {
$timeOne = new DateTime($time["start"]);
$timeTwo = new DateTime($time["end"]);
$interval = $timeOne->diff($timeTwo);
echo sprintf("%d hours %d minutes<br>", $interval->h , $interval->i);
}
?>
output:
0 hours 20 minutes
0 hours 30 minutes