Need 10 intervals between two time stamps - php

Question

I need 10 intervals between two time stamps. Please find the example below.
start_date: 2021-01-15 15:45:00
end_date: 2021-01-15 18:00:00
I need result like below based on count of intervals. I can change 5 interval or 7 intervals but the time need to calculate automatically based on intervals
15:45:00
16:00:00
16:15:00
16:30:00
16:45:00
17:00:00
17:15:00
17:30:00
17:45:00
18:00:00
function SplitTime($StartTime, $EndTime, $Duration="60"){
$ReturnArray = array ();// Define output
$StartTime = strtotime ($StartTime); //Get Timestamp
$EndTime = strtotime ($EndTime); //Get Timestamp
$AddMins = $Duration * 60;
while ($StartTime <= $EndTime) //Run loop
{
$ReturnArray[] = date ("G:i:s", $StartTime);
$StartTime += $AddMins; //Endtime check
}
return $ReturnArray;
}

Answer 1

You can use a division of the number of seconds between the 2 dates :
function SplitTime($StartTime, $EndTime, $Division = 10){
$ReturnArray = array (); // Define output
$StartTime = strtotime ($StartTime); //Get Timestamp
$EndTime = strtotime ($EndTime); //Get Timestamp
//Time diff
$diff = $EndTime - $StartTime;
// number of seconds by "step"
$num = $diff / ($Division - 1);
for ($inum = 0; $inum < $Division; $inum++)
{
$ReturnArray[] = date ("G:i:s", $StartTime + $num * $inum);
}
return $ReturnArray;
}
$dates = SplitTime("2021-01-15 15:45:00", "2021-01-15 18:00:00");
print_r($dates);
Outputs :
Array
(
[0] => 15:45:00
[1] => 16:00:00
[2] => 16:15:00
[3] => 16:30:00
[4] => 16:45:00
[5] => 17:00:00
[6] => 17:15:00
[7] => 17:30:00
[8] => 17:45:00
[9] => 18:00:00
)
See online demo