Create a loop that will increment time by one hour [duplicate] - php

Question

This question already has answers here:
Print time in 15-minute increments between two times in the same day
(10 answers)
Closed 9 years ago.
I've spent so much time on trying to figure out how to create a loop that will echo time between given $start_time and $end_time incrementing it by one hour in format HH:MM.
For example if i have $start_time = "09:00" and $end_time="15:00" the output should be like:
09:00
10:00
11:00
12:00
13:00
14:00
15:00
Any idea how to do it? I know i should use php timestamps and strtotime etc. by i have never used them, so i can't do anything, pls help...

Answer 1

You can do it with mktime()
$start = 7;
$end = 15;
for ($time = $start; $time <= $end; $time++) {
echo date("H:00", mktime($time+1)).'<br>';
}
EDIT:
Just for fun, here is another example
foreach(range(intval('07:00:00'),intval('16:00:00')) as $time) {
echo date("H:00", mktime($time+1)).'<br>';
}

Answer 2

$interval = date_interval_create_from_date_string('1 hour');
$begin = date_create('09:00');
$end = date_create('15:00')->add($interval);
foreach (new DatePeriod($begin, $interval, $end) as $dt) {
echo $dt->format('H:i') . "\n";
}
Demos:
https://eval.in/56289
https://eval.in/56291
https://eval.in/56292

Answer 3

If you just want to echo the times you can do something simple like this:
$start_time = 9;
$end_time = 15;
for ($time = $start_time; $time <= $end_time; $time++) {
if ($time < 10)
echo "0";
echo $time . ":00\n";
}

Answer 4

$start_time = "15:49";
$hours = 9;
list($h, $m) = explode(':', $start_time);
while ($hours-->0)
{
echo $h++ . ":" . $m . "\n";
}

Answer 5

Its been awhile since I've coded PHP but look at this link.
Note I posted this before the Question was edited.
while($starttime < $endtime)
{
echo $starttime;
$starttime = date_add($starttime, date_interval_create_from_date_string('1 hour'));
}