Untitled

Código:

//Índice principal.
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Formulario PHP/SQL/HTML</title>
</head>
<body>

    <?php
        error_reporting(0);
        require('displayTabla.php');

        $dbList = $_REQUEST['basesDatos'];

        $server = "localhost";
        $user = "root";
        $pass = "";

        $mysqli_db = new mysqli($server, $user, $pass);
        $mysqli_lb = new mysqli($server, $user, $pass, $dbList);

        $query1 = mysqli_query($mysqli_db, "SHOW DATABASES");
        $query2 = mysqli_query($mysqli_lb, "SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA ='$dbList';");
    ?>

    <h1>Visor dinámica de tablas</h1>

    <form action="Ejercicio3.php" method="get">
        <label>Base de datos</label>
            <select name="basesDatos">
            <option value=<?php echo $dbList; ?> selected>-Elige una BBDD-</option>
                    <?php
                        while ($row = mysqli_fetch_array($query1)) {
                            $rawdata = $row[0];
                            echo "<option value=$rawdata>$rawdata</option>";
                        }
                    ?>
            </select>
        <input type="submit" value="Seleccionar BD" name="seleccionaBD">
    </form>

    <form action="Ejercicio3.php" method="get">
        <label>Base de datos</label>
            <select name="listBases">
            <option value="" selected disabled hidden>-Elige una tabla-</option>
                <?php
                    while ($row = mysqli_fetch_array($query2)) {
                            $rawdata = $row[0];
                            echo "<option value=$rawdata>$rawdata</option>";
                    }
                ?>
            </select>
        <input type="submit" value="Seleccionar tabla" name="seleccionaLB">
        <hr>
            <?php
                $table = $_REQUEST['listBases'];
                displayTable($table);
            ?>
    </form>
</body>
</html>