PHP / SQL - 如何在数据库中获取表的名称？

I am trying to use the function mysqli_fetch_field() to get the name of each of my tables in the database. However when i try to output the table name using $fieldInfo->table i get duplicates. How can i select only 1 column from each table so that $fieldInfo->table isnt called for every column of each table?

current sql:

$sql = "SELECT * from administrators, bookings, customers, rooms";
$results = mysqli_query($conn, $sql)
or die ('Problem with query' . mysqli_error($conn));

my code to display the table name in radio buttons:

<?php
while ($fieldInfo = mysqli_fetch_field($results)) { 
?>
<input type="radio" name="tableNames" value="<?php echo $fieldInfo->table; ?>"> <?php echo $fieldInfo->table ?> <br>
<?php } ?>

I added 2 temporary table name holder and made an IF condition that only outputs the radio buttons once the 2 temporary name holders are different.

<?php
    $tempName2 = "";
    while ($fieldInfo = mysqli_fetch_field($results)) { 
        $tempName = $fieldInfo->table;
        if ($tempName != $tempName2) {
            $tempName2 = $tempName;
?>
    <input type="radio" name="tableNames" value="<?php echo $tempName; ?>" > <?php echo $tempName ?> <br>
    <?php }
} ?>

<?php
$query='SHOW TABLES FROM DB_NAME';
$results=mysqli_query($conn,$query);
while ($fieldInfo = mysqli_fetch_array($results)) { ?>
    <input type="radio" name="tableNames" value="<?php echo $fieldInfo[0]; ?>"> <?php echo $fieldInfo[0]; ?> <br>
<?php } ?>