Call to a member function modify() on string

I’am getting this "Call to a member function modify() on string"

    $date = $request->start_date;
    $start_date = date('d-m-Y',strtotime($date));
    $e_date =  $request->end_date;
    $end_date = date('d-m-Y',strtotime($e_date));
    $data = [];

   for($i = $start_date; $i <= $end_date; $i->modify('+1 day')) {
       $data[] = $i;
   }
     return $data;

>Solution :

I would suggest to use Carbon for this.

use Carbon\Carbon;

$start_date = new Carbon(strtotime('2022-01-06'));
$end_date = new Carbon(strtotime('2022-01-08'));
$data = [];

for ($i = $start_date; $i <= $end_date; $i->addDays(1)) {
   $data[] = $i;
}
return $data;

I hope it works for your situation! 🙂