CarbonInterval, undefined variable $slots - laravel

Question

<div class="form-group">
<label for="starttime"> Start time </label>
<input type="time" name="starttime" class="form-control" id="starttime" value="12:00">
<span class="invalid-feedback" role="alert">
<strong></strong>
</span>
</div>
<div class="form-group">
<label for="endtime"> end time </label>
<input type="time" name="endtime" class="form-control" id="endtime" value="05:00">
<span class="invalid-feedback" role="alert">
<strong></strong>
</span>
</div>
public function storetimeintervals(SlotStoreRequest $request){
$starttime = $request->starttime;
$interval = $request->interval;
$endtime = $request->endtime;
$intervals = CarbonPeriod::since($starttime)->minutes($interval)->until($endtime)->toArray();
foreach($intervals as $slot){
$slots= Slot::create([
'nslot'=> $slot->format('H:i'),
]);
}
if(!$slots){
return redirect()->back()->with('error','Sorry, there a problem happened while creating slot');
}
return redirect()->route('slots.index')->with('success','The slots have been created');
}
I am using carbon interval to get timeslot between two time it works fine, but when I input start time in PM then the end time in AM it cause $slots undefined. Other than that it work without error
I am expecting to input between two time without error.

Answer 1

With the below payload
{
"starttime" : "12:00PM",
"endtime" : "05:00AM",
"interval": 5
}
I found this working .
Better you convert your requested time in the proper format first.
if(strtotime($request->endtime) < strtotime($request->starttime)){
$starttime = Carbon::parse($request->starttime)->format("Y-m-d H:i:s");
$endtime = Carbon::parse($request->endtime)->addDay(1)->format("Y-m-d H:i:s");
} else {
$starttime = Carbon::parse($request->starttime)->format("H:i:s");
$endtime = Carbon::parse($request->endtime)->format("H:i:s");
}
$interval = $request->interval;
$intervals = CarbonPeriod::since($starttime)->minutes($interval)->until($endtime)->toArray();
foreach($intervals as $slot){
$slots= Slot::create([
'nslot'=> $slot->format('H:i')
]);
}
OR Check this fiddle
https://laravelplayground.com/#/snippets/23bd3a21-de15-45b0-9085-65a93c841d58