如何在php中为每个新用户创建数据库和表？

Question

I want to create database for each user with unique name. and tables in it.

if (isset($_REQUEST['createCom'])) {            
        $servername = "localhost";
        $username = "root";
        $password = "";    
        // Create connection
        $conn = new mysqli($servername, $username, $password);
        // Check connection
        if ($conn->connect_error) {
            die("Connection failed: " . $conn->connect_error);
        } 
        $company = $_REQUEST['companyname'];
        $ran = rand(0,100);    
        $random = $ran;         
        // Create database
        $sql = "CREATE DATABASE rnadom";
        if ($conn->query($sql) === TRUE) {
            echo "Database created successfully";
            header('Location: societyList.php');
        }    
        $conn->close();

if i used normal name like random it will create db. but if i used $random variable it's not creating database. and same time i want to create some tables within that database.

Answer 1

Table name can't start with digit. You can use constant value + number. Like userdb_1, userdb_2 and so on. But I don't understand how will you connect to created database later if it has random name.