$time1 = #שעת סיום#;
$time2 = #שעת התחלה#;

list($hours1, $minutes1) = explode(‘:’, $time1);
list($hours2, $minutes2) = explode(‘:’, $time2);

$total_minutes1 = $hours1 * 60 + $minutes1;
$total_minutes2 = $hours2 * 60 + $minutes2;
$difference_minutes = $total_minutes1 – $total_minutes2;

// Convert the difference back to hours and minutes
$hours = floor($difference_minutes / 60);
$minutes = $difference_minutes % 60;

// Format the result to HH:MM
return sprintf(“%02d:%02d”, $hours, $minutes);