How to print in one row instead of two? - php

Question

I have a table with reservation information, for example rooms.
The task is, i have to write them out, The problem is in the selection.
If person A booked the second room on 2018-03-12, and person B booked room 16 on the same day, i get two rows intead of just one.
I think this code could be shorter, but this is my logic...
The result of the code:
$todaysDate = date('Ymd');
$oneWeekLaterDate = date('Ymd', strtotime("+1 week"));
for($todaysDate; $todaysDate<$oneWeekLaterDate; $todaysDate++) {
$selectRooms = "SELECT room1, room2, room3, room4, room5, room6, room7, room8, room9, room10, room11,
room12, room13, room14, room15, room16, room17, room18, room19
FROM events
WHERE '$todaysDate'
BETWEEN start and end - interval 1 day";
$result = mysqli_query($connection, $selectRooms);
if (mysqli_num_rows($result)) {
While ($row = mysqli_fetch_array($result)) {
echo "<table align='center' id='table' border='1'><tr ><td colspan='20'>$todaysDate</td></tr><tr>";
for ($i = 1; $i < 20; $i++) {
if ($row['room' . $i] == '1') {
echo "<td style='background-color:red;color:white'>$i</td>";
} else {
echo "<td style='background-color:green;color:white'>$i</td>";
}
}
echo "</tr></table>";
}
}
}